#engine-source | Unreal Source | Page 15

hidden hedge May 23, 2025, 1:12 PM

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well a native build will reduce how much of the engine you need to compile

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as it will only need to compile what your project actually references

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disabling engine plugins will reduce it further

tranquil flame May 23, 2025, 1:57 PM

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hidden hedge well a native build will reduce how much of the engine you need to compile

Okay thank you I'll look into it. If you have any good tutorial feel free to share !

dusky compass May 23, 2025, 2:29 PM

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check pinned

spark hamlet May 24, 2025, 5:13 AM

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If I wanted to get a comprehensive understanding of the source code, say for the lumen rendering pipeline, what's a good place to start? I found the siggraph presentation and looked through that, but I don't know where to start looking in the source itself

dusky compass May 24, 2025, 10:21 AM

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notepad file.cpp ?

astral elm May 24, 2025, 10:37 AM

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spark hamlet If I wanted to get a comprehensive understanding of the source code, say for the...

IDE : Ctrl+Shift+F "Lumen" : E

ebon zinc May 24, 2025, 6:32 PM

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Rider issue that someone might have had before. We are using a source build of the editor. I build it on my machine and send out our version to the team. On my machine there is an unreal source version folder, and in another folder i have what i send out to everyone else and I use this version day-to-day to work as we don't change the engine often. Both versions have registry entries. The source is a GUID, and the day-to-day has a name so that the whole team has a registry key that matches what the .uproject points at.

OK now the problem, on my machine when I want to step through some engine code I put a breakpoint in the file in quesiton [DayToDayDir]/.../whatever.cpp. And when I'm running and the breakpoint hits (which it does), instead of showing me that line of code in [DayToDayDir]/.../whaterver.cpp it instead opens [SourceDirWhereDayToDayOrginallyBuilt]/.../whatever.cpp I can still step line by line, but I can no longer inspect any of the variables which sucks. Anyone know where the resolve of file is breaking down? Here is a visual. A is the file i set the breakpoint in, B is the source engine tab that opens

astral elm May 25, 2025, 12:21 AM

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ebon zinc Rider issue that someone might have had before. We are using a source build of t...

is your games .uproject file
"EngineAssociation": "5.5",
set to the correct daytoday engine guid?

ebon zinc May 25, 2025, 12:30 AM

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it’s set to a non-GUID string that matches the registry entry associated with the day to day location

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Somewhere there seems to be some list of paths it looks for and the build source folder is higher up because if I rename the unreal source build folder the debugger works as expected.

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I tried a bunch of stuff but it behaves strange. So I filed a support post with jetbrains.

oak wind May 26, 2025, 12:29 PM

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Hey,
so I just successfully built the engine from source.
However when I try to open the unreal editor it takes around half an hour to just get passed the loading screen.
After creating a binary build for that engine source it works just as usual with any other vanilla engine version.

What I noticed is that the "Loading PreDefault Modules for Plugin: xyz" is what takes that long.
It might even have to do something with the .pdb files, as my Binary build also loads very very slow until i removed the .pdb files resulting in my binary build to load the editor in a few seconds again.

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I got an Intel i7 14th gen and around 64GB of RAM.
So my pc shouldn't be the problem

dusky compass May 26, 2025, 1:05 PM

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Every new project you create/open will compile all shaders

dreamy bluff May 26, 2025, 9:09 PM

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Somehow my editor (source build) will do a full rebuild when changing between the ue5.sln and my project. What should I check? There is probably some misconfiguration, that it invalidates the other binaries?!

dusky compass May 26, 2025, 9:41 PM

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there isnt, this is how source build is

hidden hedge May 26, 2025, 9:50 PM

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dreamy bluff Somehow my editor (source build) will do a full rebuild when changing between th...

Use a native project and at least then UE5.sln contains your game

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And you just build your own project only

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The contents of YourProjectEditor.Target.cs also affect the original problem

hidden hedge May 27, 2025, 6:54 PM

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<@&213101288538374145>

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ty

hearty sand May 27, 2025, 6:55 PM

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https://tenor.com/XpB4.gif

Tenor

red kit

▶ Play video

small silo May 29, 2025, 12:49 AM

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I setup a source build with a new Games folder next to the Engine folder in root. When I build a different project it re builds the entire engine code each time. Is there anyway to get it to share the built artifacts between projects?

dusky compass May 29, 2025, 1:28 AM

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no, that is how source build is, literally the question above.
you can try different build types like monolithic but it usually does not work for multiproject setup

small silo May 29, 2025, 10:15 AM

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But surely there must be a way to build the engine separately and use that build for each project?

smoky goblet May 29, 2025, 10:22 AM

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I don’t know about building the engine separately, but I’ve had no problems with multiple projects using the same engine source. I don’t build the engine separately, just as part of building each project and its dependencies. Switching between projects doesn’t cause engine rebuilds for me.

hidden hedge May 29, 2025, 10:41 AM

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like before, I would be checking for inconsistent MyProjectEditor.Target.cs settings

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but I've always kept engine and project 1:1

polar hill May 29, 2025, 11:16 AM

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Hello i was trying to build UE 5.4.4 from source, but i got an error far into the process, so i looked at the log and this is what i could find:

[63/82] Link [x64] UnrealEditor-RiderLink.dll
   Creating library C:\Users\laust\AppData\Local\Temp\UnrealLink\Gyjywew\HostProject\Plugins\RiderLink\Intermediate\Build\Win64\x64\UnrealEditor\Development\RiderLink\UnrealEditor-RiderLink.sup.lib and object C:\Users\laust\AppData\Local\Temp\UnrealLink\Gyjywew\HostProject\Plugins\RiderLink\Intermediate\Build\Win64\x64\UnrealEditor\Development\RiderLink\UnrealEditor-RiderLink.sup.exp
 Compile [x64] Module.RenderCore.2.cpp: Exited with error code 2 . The build will fail.
 Compile [x64] Module.RenderCore.2.cpp: WorkingDirectory C:\UE_Source\UE_5.4.4\Engine\Source
 Compile [x64] Module.RenderCore.2.cpp: C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\bin\Hostx64\x64\cl.exe @"..\Intermediate\Build\Win64\x64\UnrealEditor\Development\RenderCore\Module.RenderCore.2.cpp.obj.rsp"
[64/82] Compile [x64] Module.RenderCore.2.cpp
C:\UE_Source\UE_5.4.4\Engine\Source\Runtime\RenderCore\Private\RenderGraphPrivate.cpp(189) : error C4756: overflow in constant arithmetic
   while compiling GetClobberValue
[65/82] Compile [x64] Module.RiderLogging.cpp
[66/82] Link [x64] UnrealEditor-RiderLogging.lib
   Creating library C:\Users\laust\AppData\Local\Temp\UnrealLink\Gyjywew\HostProject\Plugins\RiderLink\Intermediate\Build\Win64\x64\UnrealEditor\Development\RiderLogging\UnrealEditor-RiderLogging.lib and object C:\Users\laust\AppData\Local\Temp\UnrealLink\Gyjywew\HostProject\Plugins\RiderLink\Intermediate\Build\Win64\x64\UnrealEditor\Development\RiderLogging\UnrealEditor-RiderLogging.exp
[67/82] Compile [x64] Module.RiderLC.cpp

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And i suppose this is what causes the error:
Compile [x64] Module.RenderCore.2.cpp: Exited with error code 2 . The build will fail.
But i dont understand why

hidden hedge May 29, 2025, 12:25 PM

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this looks like output of using marketplace packaging for the riderlink plugin

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not building a source build

astral elm May 29, 2025, 1:33 PM

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small silo But surely there must be a way to build the engine separately and use that build...

Yes. We have for example main project and test project using a single source fork, in a non-native configuration. I thought that would work fine in native config too?

smoky goblet May 29, 2025, 1:53 PM

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Yeah it absolutely should. At work we have multiple R&D projects setup in a native configuration to share an engine. At home I have multiple projects in a non-native configuration sharing one engine.
Both work as expected without any extra builds.

dusky compass May 29, 2025, 1:54 PM

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small silo But surely there must be a way to build the engine separately and use that build...

yes

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it is called installed build

astral elm May 29, 2025, 5:25 PM

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dusky compass it is called installed build

that is not needed : seems to be only for convenience to distribute an editor for a team

oak wind May 29, 2025, 9:41 PM

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Hey, I just downloaded the engine source and tried to build it on my machine.
However I get an unhandled exception: BadImageFormatException: An attempt was made to load a program with an incorrect format. (0x8007000B) for almost all my processes.

Would anyone know what exactly I am missing?

astral elm May 29, 2025, 10:09 PM

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oak wind Hey, I just downloaded the engine source and tried to build it on my machine. Ho...

Are you following the setup docs for your version faithfully?
https://dev.epicgames.com/documentation/en-us/unreal-engine/building-unreal-engine-from-source

oak wind May 29, 2025, 10:38 PM

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astral elm Are you following the setup docs for your version faithfully? https://dev.epicga...

Yep, the only thing that would come to my mind is that I run the Setup.bat with the following arguments to save some space
--exclude=TVOS --exclude=HoloLens --exclude=Lumin --threads=12 --max-retries=4 --no-cache
But I don't see how that could possibly mess up my engine

astral elm May 29, 2025, 10:52 PM

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oak wind Yep, the only thing that would come to my mind is that I run the Setup.bat with ...

yeah, that looks reasonable

astral elm May 29, 2025, 10:53 PM

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oak wind Yep, the only thing that would come to my mind is that I run the Setup.bat with ...

your log doesn't mention compiler issue?
OR if you have recently solved that one, try deleting binaries + intermediate

alpine plaza May 30, 2025, 6:16 AM

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what's a typical build time for the whole engine? that documentation page mentioned 10-40 minutes, but my build times have been way longer than that.

iron dome May 30, 2025, 6:22 AM

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The better a PC you have, the shorter the build times

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Things that matter:

Number of cores / cpu speed
Amount of memory
Hard drive speed

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The more you ahve of each, the better. But they are all limiting factors. Having a hdd and 600 cores won't benefit you because the hdd is too slow.

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With a 3-series threadripper and 128gb of ram and an ssd, I built the engine in about 13 minutes.
With my laptop with a 9955HX3D, 64gb of ram and an ssd it takes about 17 minutes.
When I was used an external usb drive, that compile time went up to an hour.

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If your machine isn't comparable to these, expect much longer build times.

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Just don't rebuild your engine very often unless you absolutely have to and you'll be fine, no matter what system you're running. Do it overnight if it takes a while, etc.

alpine plaza May 30, 2025, 6:35 AM

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i9 9900k / 48gb RAM / older intel NVMe drive, it can take up to 2 hours

iron dome May 30, 2025, 6:48 AM

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When you compile, check the messages near the start. It will tell you how many processes it is using.

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If it's low for some reason, it won't go very fast.

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For instance, I had mine compile with 5 once, instead of 30, because of random ram usage.

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I turned off the ram check.

alpine plaza May 30, 2025, 6:58 AM

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i don't think it's that, while it's building all cores are loaded nearly 100%

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yeah just saw a message about 8 cores 16 threads

iron dome May 30, 2025, 7:42 AM

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Then you may just have a slow cpu.

dusky compass May 30, 2025, 10:37 AM

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https://tenor.com/ba36u.gif

Tenor

bright crown Jun 2, 2025, 8:21 PM

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First time trying to change engine files, how can I build this? (trying to make Button get focus when hovered by default)

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basycally trying to work on an already existent code i nthe easier way possible

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like, do this need a very compliacted setup before working?

smoky goblet Jun 2, 2025, 8:39 PM

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bright crown like, do this need a very compliacted setup before working?

have you downloaded the source from github? or are you editing what comes with the installed build?

bright crown Jun 2, 2025, 8:39 PM

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second option, I guess

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tryin to edit it in my own project

smoky goblet Jun 2, 2025, 8:41 PM

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If you want to edit the engine, you have to download it from github and build it.
You can't edit the source you get from the launcher/installed build and compile that.

bright crown Jun 2, 2025, 8:42 PM

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but if I do this it will change the engine for ALL projects?

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and whn I build the game, will it contain my changes?

smoky goblet Jun 2, 2025, 8:49 PM

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It will change the engine for all the projects that use that version of the engine. You can still control with engine version each project uses.
Or control it through your use of source control to determine what changes each project currently has applied to the engine.
Yes, when you build the game it will build the engine.

bright crown Jun 2, 2025, 8:49 PM

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tks

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last question, where do i find the tutorial to clone the engine code?

smoky goblet Jun 2, 2025, 8:50 PM

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https://dev.epicgames.com/documentation/en-us/unreal-engine/building-unreal-engine-from-source

Epic Games Developer

Building Unreal Engine from Source | Unreal Engine 5.5 Documentatio...

Compiling Unreal Engine from source code.

dusky compass Jun 2, 2025, 9:43 PM

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You first need to build vanilla engine before attemptign to source edits

bright crown Jun 3, 2025, 2:08 PM

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newbie question: I need to go to commit 5.4.4 release to use the same version I have now?

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and should I unistall my current instalation?

bright crown Jun 3, 2025, 6:09 PM

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HELP?

📎 message.txt

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I have downloaded

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executed the setup file

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then the genrate one

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do I need to also install 5.4 via epic games launcher?

quiet knot Jun 3, 2025, 6:44 PM

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Anyone with experience making installed builds. If I make an installed build using: -set:WithServer=false Will this also disable Listening Servers?
Or it only affects dedicated server targets?

dusky compass Jun 3, 2025, 7:10 PM

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it should not, that target is speifically for dedicatedserver

quick crystal Jun 3, 2025, 7:30 PM

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I cloned the latest release branch (5.6.0), updated a copied (cloned a fresh repo of it) version of my game project to use the 5.6 source version, generated project files, and then started to build the project. It says it is compiling 8.1k items?

astral elm Jun 3, 2025, 8:28 PM

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bright crown do I need to also install 5.4 via epic games launcher?

No, source is independent of launcher.

astral elm Jun 3, 2025, 8:45 PM

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quick crystal I cloned the latest release branch (5.6.0), updated a copied (cloned a fresh rep...

Native or separate arrangement? In any case sounds like you are compiling whole engine, which should only happen once for engine. After that compile game only.

quick crystal Jun 3, 2025, 9:06 PM

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astral elm Native or separate arrangement? In any case sounds like you are compiling whole ...

Normally I just compile the game project and it only compiles the modules I need, but I guess this is fine for now.

dusky compass Jun 3, 2025, 9:39 PM

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you are probably building default UE5

grim turtle Jun 4, 2025, 2:08 AM

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quick crystal I cloned the latest release branch (5.6.0), updated a copied (cloned a fresh rep...

This is happening to me too for some reason. Every time I delete my project files like Intermediate, Binaries, etc. It compiles a bunch of source files. have you found a solution to it?

quick crystal Jun 4, 2025, 2:15 AM

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So far after all of that compiled I have been ok.

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It just took 3 hours

grim turtle Jun 4, 2025, 2:15 AM

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Hmmm, weird. Literally any time I clean my project, I ahve to build anywhere between 700-900 files

quick crystal Jun 4, 2025, 2:16 AM

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Why are you cleaning?

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I never clean

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I only build the project

grim turtle Jun 4, 2025, 2:16 AM

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Like deleting my binaries, intermediate, etc

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I don't do it every time, just when something goes awry

grim turtle Jun 4, 2025, 2:42 AM

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Figured it out. All good

quick crystal Jun 4, 2025, 3:21 AM

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grim turtle Figured it out. All good

Oh nice, what was the issue?

heady sparrow Jun 4, 2025, 9:37 AM

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bright crown HELP?

this error is probably because you have the wrong windows sdk

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also since the thing you are trying to change has a multicast delegate why can't you just add your code to there?

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just extent UButton and make yours listen to that when it is created

heady sparrow Jun 4, 2025, 10:01 AM

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so I don't think you need to build the whole engine just for this

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but hey, now you can change them to do exactly what you want I geuess

bright crown Jun 4, 2025, 12:24 PM

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heady sparrow just extent UButton and make yours listen to that when it is created

like an inheritance or like an extension that will change the whole UButton class

short pike Jun 5, 2025, 1:10 PM

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Trying to run my UE5.5 project via UGS with precompiled binaries (build from Horde Agent), but it fails building UnrealBuildTool when running from UGS:

Launching UnrealBuildTool... [<WorkspacePath>/Engine/Build/BatchFiles/Build.bat -Mode=QueryTargets -Project="<WorkspacePath>/Projects/<ProjectName>/<ProjectName>.uproject" -Output="<WorkspacePath>/Projects/<ProjectName>/Intermediate/TargetInfo.json" -IncludeAllTargets]
Building UnrealBuildTool...
Building UnrealBuildTool in <WorkspacePath>/...
Project file not found at <WorkspacePath>/Engine/Source/Programs/UnrealBuildTool/UnrealBuildTool.csproj
Failed to build UnrealBuildTool.
LogDesktopPlatform: Warning: Failed to compile UnrealBuildTool (project file is '<WorkspacePath>/Engine/Source/Programs/UnrealBuildTool/UnrealBuildTool.csproj', exe path is '<WorkspacePath>/Engine/Build/BatchFiles/Build.bat')
LogDesktopPlatform: Warning: Unable to read target info for ../../../Projects/<ProjectName>/<ProjectName>.uproject
Running <WorkspacePath>/Engine/Build/BatchFiles/Build.bat Development Win64 -Project="<WorkspacePath>/Projects/<ProjectName>/<ProjectName>.uproject" -TargetType=Editor -Progress -NoEngineChanges -NoHotReloadFromIDE
ERROR: The batch file does not appear to be located in the Engine/Build/BatchFiles directory. This script must be run from within that directory.

I have Synced Filter setup to only download Content. It shouldn't try building UnrealBuildTool, because I'm set on precompiled binaries. Anyone got an idea on what is wrong?

short pike Jun 5, 2025, 1:23 PM

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short pike Trying to run my UE5.5 project via UGS with precompiled binaries (build from Hor...

So Failing to compile UnrealBuildTool is just a warning. It seems to fall back on using Build.bat, but I ensured that /Engine/Build/BatchFiles/Build.bat is there.
Why does it say:
ERROR: The batch file does not appear to be located in the Engine/Build/BatchFiles directory. This script must be run from within that directory. then?

dusky compass Jun 5, 2025, 1:48 PM

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'<WorkspacePath>/Engine/Source/Programs/UnrealBuildTool/UnrealBuildTool.csproj'

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does not look correct

short pike Jun 5, 2025, 1:54 PM

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UnrealBuildTool.csproj shouldn't matter with precompiled binaries.

dusky compass Jun 5, 2025, 2:07 PM

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Greatly depends. bat-scripts have some opinionated logic that may/will still build it just because it feels like it needs to, hence why I never use them
still, <WorkspacePath>/ us incorrect and should have been expanded into a real path

short pike Jun 5, 2025, 2:07 PM

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dusky compass Greatly depends. bat-scripts have some opinionated logic that may/will still bui...

<WorkspacePath> was my part. It had the full path 👍

dusky compass Jun 5, 2025, 2:10 PM

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open Build.bat and see why it wants to build UBT then

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in fact the issue is why that build.bat being called in a first place

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this is some postcheckout action

smoky goblet Jun 5, 2025, 7:57 PM

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Is there an alternate place for the cross-compile toolchains? Epic's Linux page downloads the wrong toolchain for 5.6. The doc says you should use v25, but clicking the link (that says v25) actually downloads v23.
A quick google of the toolchain name doesn't come up with anything that seems like it's the same thing.

dusky compass Jun 5, 2025, 8:34 PM

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try v23 often times it can work just fine

smoky goblet Jun 5, 2025, 11:45 PM

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dusky compass try v23 often times it can work just fine

I already have that installed and I'm getting Engine compile errors with Linux.
Maybe that's unrelated, but I wasn't getting any errors with 5.5

smoky goblet Jun 6, 2025, 12:25 AM

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Tried the silly thing and just edited the url for the v23 to be v25 and it worked. crazy.
link for anyone else: https://cdn.unrealengine.com/CrossToolchain_Linux/v25_clang-18.1.0-rockylinux8.exe

frigid crypt Jun 6, 2025, 8:36 PM

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Where can I found the world partition and streaming changes from 5.4.4 to 5.6.0 ?
I crafted a custom solution that loads / unloads properly different VFX's and lights that supports world partition but after upgrading my project to 5.6.0 most of the things are not working. I sense that world partition was changed drastically in the BE

dusky compass Jun 6, 2025, 8:54 PM

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do respectitive file diffs between versions

normal crag Jun 7, 2025, 2:21 PM

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Hello! Is UE5 modifiable enough so that you could rewrite half of it’s lightning models, pass structure, use own shading models, atmospherics, etc?

dusky compass Jun 7, 2025, 2:44 PM

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you literally have access to whole source

leaden sequoia Jun 7, 2025, 3:13 PM

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Can we make own compiler for UE5 ? Anyone heard of Open-Source TPDE ? UE has officially supported is Clang right ?! How can I make custom one like TPDE ?

Recent post from phoronix blog says that TPDE compiler is 10 - 20x faster than LLVM

Thanks in advance

smoky goblet Jun 7, 2025, 3:21 PM

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leaden sequoia Can we make own compiler for UE5 ? Anyone heard of Open-Source TPDE ? UE has off...

Yes the engine supports multiple compilers, including Clang but they tend to be tide to platforms so Clang only gets used for Linux.
I've never heard of anyone swapping out the compiler, but that doesn't mean it's not possible.
But why even bother? Are you really bottlenecked by compile times? There are other things you can do to improve your compilation without resorting to replacing a compiler (which may have significant knock-on to engine code that's not worth fixing)

west cargo Jun 7, 2025, 5:41 PM

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this is more of a minor thing i guess, but does someone here have experience with making an installed build of unreal from source?

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our custom version of unreal works completely fine when building in vs, but the installed build seems to keep throwing different errors depending on the build device i use

dusky compass Jun 7, 2025, 5:49 PM

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well read the errors and address them

glass mauve Jun 7, 2025, 7:20 PM

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on that topic, anyone got any idea what happened here? Package '/Engine/EditorMaterials/AssetViewer/T_GreyAmbient' has been saved with a newer engine version and can't be loaded. Current EngineVersion: 5.6.0-174+++streamsDepot+mainline (Licensee=0). Package EngineVersion: 5.6.0-38216408+++Fortnite+Main (Licensee=0)
I know this can happen when accidentally moving assets from another engine version, but I definitely don't have access to Epics Fortnite+Main stream so I am a bit confused how this happened with a bunch of EditorMaterials

west cargo Jun 7, 2025, 7:35 PM

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dusky compass well read the errors and address them

on my current system, these are the errors im getting
[1/390] Compile [x64] Module.AudioSynesthesiaCore.cpp I:\engine\Engine\Plugins\Runtime\AudioSynesthesia\Source\AudioSynesthesiaCore\Private\PeakPicker.cpp(17) : error C4756: overflow in constant arithmetic while compiling Audio::FPeakPicker::FPeakPicker [2/390] Compile [x64] Module.RenderCore.2.cpp I:\engine\Engine\Source\Runtime\RenderCore\Private\RenderGraphPrivate.cpp(189) : error C4756: overflow in constant arithmetic while compiling GetClobberValue [3/390] Compile [x64] Module.LiveLink.cpp I:\engine\Engine\Plugins\Animation\LiveLink\Source\LiveLink\Private\LiveLinkClient.cpp(1728) : error C4756: overflow in constant arithmetic while compiling FLiveLinkClient_Base_DEPRECATED::PushSubjectData [4/390] Compile [x64] Module.PoseSearch.3.cpp I:\engine\Engine\Plugins\Animation\PoseSearch\Source\Runtime\Private\PoseSearchLibrary.cpp(134) : error C4756: overflow in constant arithmetic while compiling FMotionMatchingState::Reset

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the main thing is that i never touched any of these files, and all the changes for the engine were made in service of a new shading model for celshading. and i only get these errors when compiling for an installed build, visual studio and make on linux dont give me issues

dusky compass Jun 7, 2025, 7:38 PM

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that looks like sdk or compiler are invalid

west cargo Jun 7, 2025, 7:40 PM

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im building on windows 10 with the windows 10 sdk, but when i did that it gave an error that i didnt have the right version of the windows sdk installed so i gave it a go with the windows 11 sdk. it got me much further, but only to where i am now

dusky compass Jun 7, 2025, 7:40 PM

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you need to make sure compiler and SDK versions match requirements for specific UE version

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installing isn enouhg read the log and confirm that is what it uses

thick furnace Jun 8, 2025, 12:14 PM

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west cargo on my current system, these are the errors im getting `[1/390] Compile [x64] Mod...

are those files use old winapi float/double INFINITY constants?
you can either fix them to not try force 1e300 into float and use TNumericLimits<Float>::Max() etc. newer engine fixed usages of them

west cargo Jun 8, 2025, 2:19 PM

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I think the issue ended up being I was using the newest version of msvc and the windows sdk, but neither were actually compatible with unreal

thick furnace Jun 8, 2025, 2:20 PM

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west cargo I think the issue ended up being I was using the newest version of msvc and the ...

you don't use "latest", UE has specific version it supports. 14.38 compiler and 19xxxx/20xxxx SDK (varies on version)

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latest != best in terms on compiler, each has own possible codegen bugs and SDK determines minimal supported OS version

west cargo Jun 8, 2025, 2:22 PM

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Yeah, I think I mistakenly installed it because it said some component was missing and a quick search led me to some forum post telling me that I didn't have the sdk properly installed

little cobalt Jun 8, 2025, 2:51 PM

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does anybody know a fix for this?
Creating makefile for UnrealEditor (no exisiting makefile)
gets stuck and never completes

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I've had this happen before but idk how i fixed it

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its doing something

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i can see that in the log file

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i guess hitting clean solution wasn't that smart :D

heady sparrow Jun 9, 2025, 12:16 AM

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try running setp.bat again I suppose

calm mason Jun 9, 2025, 7:22 AM

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I am trying to build Unreal 4.27 from source. Does anyone know if it's possible to force Unreal to use an older version of the compiler/toolchain?
I have the older versions installed, but it is not being used.

On Unreal 5. + it will somehow use the preferred version if installed...

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I would prefer to avoid having to uninstall the newer versions.

calm mason Jun 9, 2025, 7:38 AM

#

In fact, uninstalling 'Latest' causes all kinds of problems anyway 😖

dusky compass Jun 9, 2025, 8:53 AM

#

calm mason I am trying to build Unreal 4.27 from source. Does anyone know if it's possible ...

buildconfiguration.xml

calm mason Jun 9, 2025, 9:28 AM

#

Ok so it took me a little while to figure out the exact versions I had installed, and to realise that the strings should not be quoted. Here's my final buildconfiguration.xml for Unreal 4.27.4

<Configuration xmlns="https://www.unrealengine.com/BuildConfiguration">
    <WindowsPlatform>
        <CompilerVersion>14.38.33130</CompilerVersion>
        <WindowsSdkVersion>10.0.19041.0</WindowsSdkVersion>
    </WindowsPlatform>
</Configuration>

thick furnace Jun 9, 2025, 9:33 AM

#

17.8 / 33130 is a bit too new for 427, you will get warnings about too new compiler but you can just ignore them

#

your buildconfiguration.xml would have to be global My Documents/Unreal Engine/UnrealBuildTool or AppData/Unreal Engine/UnrealBuildTool as other paths not supported in 427
you could tweak it in XmlConfig.cs FindInputFiles()

calm mason Jun 9, 2025, 9:55 AM

#

Ok thanks. I edited the one in UnrealEngine\Engine\Saved\UnrealBuildTool\BuildConfiguration.xml to avoid affecting other installations.
I have not tested it yet, I'll need to try it tomorrow. There was warnings about Min Compiler Version but nothing critical so far.

thick furnace Jun 9, 2025, 1:05 PM

#

oh, yea. that works for non-installed build

merry talon Jun 13, 2025, 10:28 AM

#

Hi there!
I have a Standard NV36ads A10 v5 server in Azure (36 vCPU, dedicated GPU 22 Gb, Shared GPU 220 Gb). When I run renders I see that my shared GPU is almost not used. Can this significantly affect performance? If so, is there a setting to enable the use of the entire shared GPU?

maiden temple Jun 14, 2025, 6:35 AM

#

Hi - does anyone know the correct way to copy data between textures to ensure thread-safety?
I'm making a custom Unreal build which uses a UCurveLinearColorAtlas for cel shading, but I don't think having the render thread directly reference the texture is thread-safe and my attempts to copy data don't seem to function correctly
This is my current code for copying the texture

int32 TexSizeX = CelshadingCurveAtlas->TextureHeight;
uint16 Stride = TexSizeX * 4;
uint8* TexData = (CelshadingCurveAtlas->Source.LockMip(0));
CopyTextureData2D(TexData, DataBuffer, TexSizeY, EPixelFormat::PF_R8G8B8A8, Stride, Stride);
CelshadingCurveAtlas->Source.UnlockMip(0);
ProxyTexture->UpdateTextureRegions(0, 1, TextureRegion, Stride, 4, DataBuffer);
ProxyTexture->UpdateResource(); ```

broken sand Jun 15, 2025, 5:06 AM

#

curious what folks here have tried to make building the engine from source faster. ive heard these ideas mainly:

make the project in a launcher version of the engine first, switch that project version to the source version then build the project
enable multi processor/parallel compilation in visual studio
force ubt to use all cores
setting power plan to high performance or even ultimate performance
disable incredibuild
use the command line (msbuild) instead of the gui (visual studio)
make sure ram runs at full speed
add parameters to setup.bat to exclude dependencies

of course the biggest drivers are always hardware, for e.g., switching from hdd to ssd or upgrading ram and CPU specs but just wanted to know if others have went beyond that to make building the engine from source even faster. And this list I compiled is mainly just "ideas" so not sure if anyone's already tried these and they made no difference

heady sparrow Jun 15, 2025, 11:41 AM

#

use a distributed build with unreal build accelerator

#

which is similar to existing distributed build setups like expensivebuild

#

this of course requires having more compuiters to run it on

broken sand Jun 15, 2025, 6:08 PM

#

heady sparrow use a distributed build with unreal build accelerator

thanks, didn't even know this was possible, is there any documentation on this? I found this epic doc, https://dev.epicgames.com/documentation/en-us/unreal-engine/horde-unreal-build-accelerator-and-remote-compilation-tutorial-for-unreal-engine, just wanna make sure I'm on the right track

broken sand Jun 15, 2025, 6:09 PM

#

heady sparrow this of course requires having more compuiters to run it on

people could use aws ec2 instances perhaps? (free tier) definitely very interested in this because it could really help out those with lower specs if I'm picturing this right

void owl Jun 15, 2025, 6:10 PM

#

broken sand thanks, didn't even know this was possible, is there any documentation on this? ...

you are on right track, although in UE 5.6 things changed and are no longer handled in BuildConfiguration.xml

#

sadly the docs have yet to catch up

#

and the code examples are also... wrong 🙂

broken sand Jun 15, 2025, 6:11 PM

#

void owl you are on right track, although in UE 5.6 things changed and are no longer hand...

😦 I did notice this last night

void owl Jun 15, 2025, 6:12 PM

#

Either way... simple way for you would be to spin up horde unless you have existing instance either on premisse if you have enough spare compute power or in cloud... then spin up compute of Horde agents - preferably using ASG or something... most cost effective is to use linux spot instances... and then just point your Engine to the horde

#

; ---------------------------------
; UBA Settings - See Engine/Source/Programs/UnrealBuildTool/Executors/UnrealBuildAccelerator/UnrealBuildAcceleratorHordeConfig.cs
; ---------------------------------

[UbaController]
+BuildMachineProviders=Uba.Provider.Horde.Internal
+Providers=Uba.Provider.Horde.Internal

[Uba.Provider.Horde.Internal]
ServerUrl="https://horde.vm.compute.jech.xyz"
UbaPool=Compute
UbaEnabled=True
UbaConnectionMode=Direct

; ---------------------------------
; UBA Cache Settings - Engine\Binaries\Win64\UnrealBuildAccelerator\x64\UbaCacheService.exe
; ---------------------------------

[UbaController]
+BuildMachineCacheProviders=Uba.CacheProvider.Uba.Internal
+CacheProviders=Uba.CacheProvider.Uba.Internal

[Uba.CacheProvider.Uba.Internal]
Url=ubacache.vm.compute.jech.xyz:1347
Write=True
RequireVFS=True

here is example of what we use, it's pretty basic (also the domain is intranet only so don't worry) - you're mostly interested in the first half

#

with EC2 you might need to spin up horde relay and go through the relay instead of using Direct connection as we have small compute cluster on premise

broken sand Jun 15, 2025, 6:15 PM

#

thank you so much. I am very very new to this horde stuff so I have a lot of catching up to do

void owl Jun 15, 2025, 6:16 PM

#

if you want to use Horde purely for UBA it's super easy... it gets more complicated the moment you start putting your CI into it since in that moment you have to start taking bigger care of your build agetns (SDKs, diskspace etc... etc...)

broken sand Jun 15, 2025, 6:19 PM

#

im hoping you're right that it's super easy, willing to do anything to build the source engine faster

#

less so for me but moreso for others. not trying to self promote but I've made videos on this topic for a while now and I always get sad seeing comments saying the source build takes forever

void owl Jun 15, 2025, 6:24 PM

#

oh yeah, editor builds without any caching or acceleration easily take 1.5 on mid-range PC

broken sand Jun 15, 2025, 6:25 PM

#

1.5 is generous

#

but yea still bad

void owl Jun 15, 2025, 6:25 PM

#

that's how long it takes on my machine ~4.5k units, 9950X (16 core/32 thread) CPU

#

clean local rebuild with fully cached stuff (ideal case) can take ~3 minutes from my experience.... and even without caching, UBA can help a lot... although there's no specific number since it depends on factors like network speed, amount of available compute etc. etc.

broken sand Jun 15, 2025, 6:27 PM

#

i guess compared to what the average epic employee, yea that's mid range

#

that's also my cpu too funny enough

void owl Jun 15, 2025, 6:28 PM

#

broken sand i guess compared to what the average epic employee, yea that's mid range

my old desktop was 3990x (64 core/128 thread) so I consider my current offering mid-range kek

#

either way, just for example... this is a small compute cluster I have at home - it struggels with disk IO during UBA, so the compile speed isn't the greatest... and I'm 10 minutes in into full editor recompile and I'm already 45% done

broken sand Jun 15, 2025, 6:30 PM

#

dang 5 computes?

void owl Jun 15, 2025, 6:30 PM

#

I've got whole "home heater" cluster kek

#

planning to shift it to some colo later in the summer, since it's HOOOOOT in the summer

broken sand Jun 15, 2025, 6:31 PM

#

wowzer

void owl Jun 15, 2025, 6:33 PM

#

I'm planning to spin up secondary UBA cluster now that UE 5.6 added support for multiple clusters - so I can spin up fully separate horde instance directly at AWS without having to connect and/or proxy my agents through my on-prem horde

#

and we'll see how it will go with 512 cores instead of 92

#

*96

broken sand Jun 15, 2025, 6:35 PM

#

it sounds cool but like i do wish unreal was more optimized so that 512 cores wouldn't ever have to be thought about

void owl Jun 15, 2025, 6:35 PM

#

broken sand it sounds cool but like i do wish unreal was more optimized so that 512 cores wo...

it's not about unreal being optimized... unreal is just huge

#

that's the issue

#

but also that's the price for versatile engine

broken sand Jun 15, 2025, 6:35 PM

#

i know it's huge but unreal 4 was also "huge"

#

yea true

void owl Jun 15, 2025, 6:36 PM

#

broken sand i know it's huge but unreal 4 was also "huge"

compared to 5... not really

broken sand Jun 15, 2025, 6:36 PM

#

i thought we were supposed to plateau according to moore's rule laughcry

void owl Jun 15, 2025, 6:37 PM

#

Either way... with that compute cluster it took ~1000 seconds - ~17 minutes

#

using .\RunUBT.bat Win64 MatchoEditor Development -Rebuild

#

with 0 cache hits, so worst case

broken sand Jun 15, 2025, 6:37 PM

#

very nice

void owl Jun 15, 2025, 6:38 PM

#

now let's see with full cache... 😉 (you can use UBA and UBA Cache even without remote agents helping you)

broken sand Jun 15, 2025, 6:41 PM

#

void owl now let's see with full cache... 😉 (you can use UBA and UBA Cache even without ...

you're just doing one machine or? sorry again im very new to this

void owl Jun 15, 2025, 6:42 PM

#

no, I'm using my cluster... but I also have separate UBA cache running... and you can use local UBA independently from remote UBA and cache

#

local UBA is faster than normal MPC build

#

because better scheduling

#

and UBA cache helps a lot by trading compute for network speed

#

my full editor recompile with full cache took 40 seconds 🙃

#

but as I've said, that is not really representative of reality, since you're highly unlikely to have everything already cached

#

actually it took me more time to create the makefile for the editor than compiling itself (or more precisely fetching from cache)

#

but that's windows being cranky, the more you do large compiles such as unreal engine etc... windows gets sloooooooooooow..

broken sand Jun 15, 2025, 6:47 PM

#

what is "MPC"?

void owl Jun 15, 2025, 6:47 PM

#

multi process cook... the old pre-uba way of compiling

#

i.e. if you don't have UBA enabled, you're using parallel executor

broken sand Jun 15, 2025, 6:49 PM

#

i see

void owl Jun 15, 2025, 6:49 PM

#

now... this is compile where stuff is pre-cached

broken sand Jun 15, 2025, 6:49 PM

#

is uba enabled by default in the newest version of the engine?

void owl Jun 15, 2025, 6:49 PM

#

I skipped first 3 minutes of the video where it was waiting for the makefiles facepalm

#

broken sand Jun 15, 2025, 6:49 PM

#

void owl now... this is compile where stuff is pre-cached

yea that makes sense if everything is cached locally

void owl Jun 15, 2025, 6:50 PM

#

not locally, remotely in UBA cache

#

locally I'm asking for full rebuild

#

if I had another machine with UE 5.6 and my project, I could ask it to compile everything and it would just fetch things from cache

#

as long as the hashes match

broken sand Jun 15, 2025, 6:51 PM

#

that's so cool

void owl Jun 15, 2025, 6:51 PM

#

the only reason it takes another 30 seconds is because some dualshock libraries are weird and cannot be cached and that's the last couple of things... one compile unit in total

#

sorry... three... compile cpp, link lib and link dll operations 🙂

#

here's UBA graph for the video

#

pretty much done 37 seconds in and then waiting for dualshock module to be done

broken sand Jun 15, 2025, 6:54 PM

#

where is that ubavisualizer from?

#

also sorry to repeat myself but is uba enabled by default in the newest version of the engine?

void owl Jun 15, 2025, 6:55 PM

#

broken sand also sorry to repeat myself but is uba enabled by default in the newest version ...

it's not afaik

#

you go to BuildConfiguration.xml and enable it there

#

and UBA visualizer can either be set to launch automatically from inside the BuildConfiguration xml... or just Engine/Binaries/Win64/UnrealBuildAccelerator/UbaVisualizer.exe

#

broken sand Jun 15, 2025, 6:56 PM

#

was uba only released somewhat recently? for example did unreal 4 have it or?

void owl Jun 15, 2025, 6:57 PM

#

although... nevermind... it's enabled by default in 5.6 🙂

broken sand Jun 15, 2025, 6:57 PM

#

also btw thank you for your time, this is very helpful for me

void owl Jun 15, 2025, 6:57 PM

#

broken sand was uba only released somewhat recently? for example did unreal 4 have it or?

nope, that's a thing of UE 5... to be more precise like 5.2 or 5.3

#

and now in 5.6 it's finally enabled by default

#

so, in theory you don't have to touch the BuildConfiguration.xml at all now

broken sand Jun 15, 2025, 6:58 PM

#

broken sand curious what folks here have tried to make building the engine from source faste...

I think I know your answer, but do you think any of these hacks in my bullet point list are worth experimenting with or nah

void owl Jun 15, 2025, 6:59 PM

#

I'd disable incredibuild and just stick with default unreal... building unreal never uses visual studio directly, but goes through UBT (Unreal Build Tool) first which then by proxy uses UBA...

#

and that's pretty much all I'd do... might help to set power plan if your CPU is not turbo boosting that high... but laptops tend to heat up and clock down in general

#

and compilation is mostly CPU + disk issue

#

but the more ram you have the more cores will unreal use

#

the equation is generally simple:
min(CpuCores, Ram / 1.5 GB)

#

unreal will use up to the number of cores that it can unless you're bottlenecked by ram, since every core in general uses 1.5 GB of ram during compilation

#

so if you can only satisfy 10 cores due to low ram unreal won't go higher

#

although UBA is bit more smart about it so it'll be more efficient

#

blah blah blah... just let unreal deal with this stuff, UBA is quite good at it all

slim path Jun 17, 2025, 7:29 AM

#

Hi! I ran Setup.bat with -exclude=GoogleTest but I realize control rig and a few other plugins depend on it so i cant compile the engine because its missing gtest.lib and gmock.lib. in the ThirdParty folder. How can i add them? I tried running Setup.bat -include=GoogleTest but it does not seem to make a difference..

slim path Jun 17, 2025, 7:52 AM

#

slim path Hi! I ran Setup.bat with `-exclude=GoogleTest` but I realize control rig and a f...

quick fix: yoink the .lib files from the launcher pre-compiled engine. BUT. There must be a way to do this by acutally including the dependency from setup

dusky compass Jun 17, 2025, 10:21 AM

#

slim path Hi! I ran Setup.bat with `-exclude=GoogleTest` but I realize control rig and a f...

just rerun Setup.bat without -exclude=GoogleTest and it will re-fetch them

fleet holly Jun 17, 2025, 7:44 PM

#

Related to the above, what's the current take on trying to slim down the engine a bit, mainly excluding unused platforms and plugins. I'm running Setup.bat with exclusion flags for a bunch of things but I still seem to get a lot of Mac and Linux folders that I have no use for. Is there a proven relatively straightforward strategy for removing unused stuff or is it better to just let it be bloated and spend energy on making games instead?

dusky compass Jun 17, 2025, 8:13 PM

#

see pinned

lapis barn Jun 18, 2025, 6:46 AM

#

Can anyone help me with an error I'm getting when cross compiling from Windows to Linux for an installed build? (Included relevant error log)

Here's also my build command for creating the Installed Build:

Engine\Build\BatchFiles\RunUAT.bat BuildGraph -target="Make Installed Build Win64" -script="Engine/Build/InstalledEngineBuild.xml" -set:WithServer=true -set:WithWin64=true -set:WithLinux=true -set:WithMac=false -set:WithIOS=false -set:WithTVOS=false -set:WithVisionOS=false -set:GameConfigurations=Development;Shipping -set:BuiltDirectory="C:\UE5_CustomInstalledBuild" -set:WithLinuxArm64=false -set:WithAndroid=false -set:WithDDC=false

📎 message.txt

fleet holly Jun 18, 2025, 8:42 AM

#

dusky compass see pinned

I might be blind but I can't find anything that gives information on why I have a bunch of Linux, linux32, Mac etc folders when I've been running with Setup.bat -exclude=WinRT -exclude=Mac -exclude=MacOS -exclude=MacOSX -exclude=osx -exclude=osx64 -exclude=osx32 -exclude=Android -exclude=TVOS -exclude=Linux -exclude=Linux32 -exclude=Linux64 -exclude=linux_x64 -exclude=HTML5 -exclude=PS4 -exclude=XboxOne -exclude=Switch -exclude=Dingo -exclude=Win32 -exclude=GoogleVR -exclude=LeapMotion

#

Would also be nice to have some general information on getting rid of things only used for VR or virtual production etc.. but maybe it's just tricky since some other things might depend on those for various reasons.

agile tusk Jun 18, 2025, 4:02 PM

#

Can someone help me make sense of Epic's github branching strategy?
I see the "release" branch that's tagged with "5.6.0-release", then I see a branch named "5.6" which is many many commits ahead of "release", and then I see a branch named "dev-5.6"
Should I be pulling branch "5.6" ?

cyan birch Jun 18, 2025, 5:36 PM

#

release is the last official release. 5.6 is for 5.6.x patches and features, with the next in line probably 5.6.1

So you can consider release the latest stable official release

And you can currently consider the 5.6 as an alternative for the release branch, but it may be less stable as it includes patches and features that are not officially released yet

dusky compass Jun 18, 2025, 5:46 PM

#

@agile tusk pull the 5.6.0. tag if you want 5.6.0 exactly

spring solstice Jun 19, 2025, 7:48 PM

#

Hey guys, I was contract by a company to help modify the Unreal Engine into a mod editor, I managed to block off the ability to cook packages, but I've hit another dead-end on that. Is there a certain way on how to properly compile a modded editor?

#

https://i.gyazo.com/ce6ce675fdd2a7d7d2030fffc5cc10fb.png

#

I am modifying a source code build of Unreal Engine 4.27.

dusky compass Jun 19, 2025, 8:05 PM

#

What you posted is an UAT build error, not an engine build error.
Also you/they need direct permission from Epic to redistribute editor binaries publicly, if they dont then none of this work matters.

spring solstice Jun 19, 2025, 8:08 PM

#

dusky compass What you posted is an UAT build error, not an engine build error. Also you/they...

Wdym? We're not distributing the code, we just want to build a precompiled editor for our UE4 game on Itch. The players won't be able to access the code, just use the editor to make UGC.

#

Or mods.

#

Like what Hello Neighbor has for instance.

heady sparrow Jun 20, 2025, 1:30 AM

#

spring solstice Wdym? We're not distributing the code, we just want to build a precompiled edito...

https://www.unrealengine.com/en-US/eula/unreal

Unreal Engine

Unreal Engine EULA

Unreal Engine is free to use for learning, and for developing internal projects; it also enables you to distribute many commercial projects without paying any fees to Epic Games.

iron dome Jun 20, 2025, 7:39 AM

#

You can release your own stuff to add to an editor that the end user will download from epic.

#

But not give them the entire editor as well.

astral elm Jun 20, 2025, 8:18 AM

#

So effectively plugins are ok

iron dome Jun 20, 2025, 8:19 AM

#

Or distribute assets that they can use.

#

Maybe imposter assets so they can build a "ghost" level in editor. Not sure how that'd work exactly.

hidden hedge Jun 20, 2025, 10:25 AM

#

Depending on the complexity of the project, distribution of the editor on EGL is the path of least resistance

oblique breach Jun 20, 2025, 10:53 AM

#

anyone used the TobjectPTR conversion tool yet with source control ?

#

i'm having issues it seems when running the command

iron dome Jun 20, 2025, 12:13 PM

#

hidden hedge Depending on the complexity of the project, distribution of the editor on EGL is...

That's interesting. How do you set that up?

hidden hedge Jun 20, 2025, 12:21 PM

#

Its just giving out your editor sans source code and restricted content

iron dome Jun 20, 2025, 12:39 PM

#

Cool. Thanks!

spring solstice Jun 20, 2025, 1:12 PM

#

hidden hedge Depending on the complexity of the project, distribution of the editor on EGL is...

The EULA states that I have to upload it to the Fab Marketplace.

#

https://i.gyazo.com/6207be8918c3ac94fd43e06105d6b3e0.png

hidden hedge Jun 20, 2025, 4:14 PM

#

Yeah EGL

spring solstice Jun 20, 2025, 7:38 PM

#

hidden hedge Yeah EGL

Does EGL stand for "Epic Games Launcher"?

civic meadow Jun 21, 2025, 10:13 AM

#

fleet holly Jun 25, 2025, 3:02 PM

#

Is it possible to set custom made defines when building via RunUAT? I'd basically want to be able to check (in code) if the running editor is the precompiled version or locally built from source, maybe there's a nice way to do that already?

forest mantle Jun 25, 2025, 4:06 PM

#

fleet holly Is it possible to set custom made defines when building via RunUAT? I'd basicall...

maybe there is a simpler way, but the way I've done this is (1) in projects where I want to use a source-build I have a text file above the Plugins folder, I call mine "GRADIENTSPACE_DEV_BUILD.txt". Then (2) in build.cs I have this:

        bool bIsGSDevelopmentBuild = File.Exists(
            Path.GetFullPath(Path.Combine(PluginDirectory, "..", "GRADIENTSPACE_DEV_BUILD.txt")));

and then I can set custom defines/etc in the build.cs based on bIsGSDevelopmentBuild.

fleet holly Jun 25, 2025, 4:34 PM

#

Cool will try it out!

astral elm Jun 25, 2025, 7:47 PM

#

fleet holly Is it possible to set custom made defines when building via RunUAT? I'd basicall...

I did it this way, in EngineDefines.h

#define UE_BUILD_CUSTOM_ENGINE 1

then, in game project cpp:

#define UE_BUILD_CUSTOM_ENGINE 0
#endif```

smoky goblet Jun 25, 2025, 7:52 PM

#

fleet holly Is it possible to set custom made defines when building via RunUAT? I'd basicall...

Why do you feel to need to distinguish these two things? It's never been a distinction that I've ever encountered a reason to know (at least at compile time, for bug investigation it's in the log sort of)

astral elm Jun 25, 2025, 7:54 PM

#

smoky goblet Why do you feel to need to distinguish these two things? It's never been a disti...

In our case, we have a source fork with 100% mobile focused tweaks, and we let devs + PC builds carry on with the launcher version of the engine. There was like one or two situations where we needed the game c++ to know which engine we are running off

smoky goblet Jun 25, 2025, 8:00 PM

#

And you wouldn't be able to use built in platform defines for that sort of thing? (I'm just curious)
I wouldn't have thought of trying to run the same project code off different engine source. But I've always had a binary deployment solution for prebuilt custom engine binaries, so not ever really needed anyone to rely on a launcher version.

fleet holly Jun 25, 2025, 8:02 PM

#

It's a long story and you might not agree with my pursuit :) but I basically want to do different logic in a small portion of the code depending on if it's the precompiled version or not

astral elm Jun 25, 2025, 8:02 PM

#

Yes, because we run mobile monitor + fast apk builds off the launcher, so...
This is the practical case, a chunk of code that uses the custom engine function, not available on launcher engine

{
#if UE_BUILD_CUSTOM_ENGINE
    UE_LOG(LogFunctionLibrary, Log, TEXT("Resetting touch inputs pressed states"));
    APlayerController* PlayerController = UGameplayStatics::GetPlayerController(WorldContextObject, 0);
    PlayerController->ResetInputTouchPressedStates();
#endif
}```

fleet holly Jun 25, 2025, 8:02 PM

#

Found this that might lead to something https://unrealution.com/automation/setting-a-define-inside-a-buildgraph-script/

Unrealution

Yohann

Setting a Define Inside a BuildGraph Script

astral elm Jun 25, 2025, 8:03 PM

#

You can also pass custom parameters to runuat.bat, if you are looking for something to toggle on and off at will

fleet holly Jun 25, 2025, 8:04 PM

#

I'm talking about differentiation the source version built locally by a coder and the precompiled version used by an artist (same engine source, just built locally or distributed)

#

So I was thinking the precompiled version could define IS_PRECOMPILED or such via an argument to RunUAT BuildEditorAndTools

astral elm Jun 25, 2025, 8:06 PM

#

fleet holly I'm talking about differentiation the source version built locally by a coder an...

I reckon for that, the build args might be the way to go... we have for example

    public bool Unstable = false;

ProjectDefinitions.Add(Unstable ? "UNSTABLE=1" : "UNSTABLE=0");

fleet holly Jun 25, 2025, 8:06 PM

#

Interesting!

#

Where is that defined?

astral elm Jun 25, 2025, 8:07 PM

#

<mygame>.Target.cs

fleet holly Jun 25, 2025, 8:08 PM

#

Very nice, that looks promising :)

#

How is it set when compiling? Just -Unstable directly into RunUAT?

astral elm Jun 25, 2025, 8:10 PM

#

-ubtargs=<your custom args>

fleet holly Jun 25, 2025, 8:10 PM

#

Super, thanks a ton!

astral elm Jun 25, 2025, 8:11 PM

#

fleet holly Super, thanks a ton!

Glad to be of assistance : )

indigo star Jun 26, 2025, 2:20 AM

#

Setup.bat only download half of dependencies then finish, does any one know why

Checking dependencies...
Updating dependencies: 100% (48377/88469), 11476.8 MiB cached...
Press any key to continue . . .

Generate project file failed due to missing depencies:

Setting up Unreal Engine 5 project files...

GenerateProjectFiles ERROR: It looks like you're missing some files that are required in order to generate projects.  Please check that you've downloaded and unpacked the engine source code, binaries, content and third-party dependencies before running this script.

Press any key to continue . . .

heady sparrow Jun 26, 2025, 5:14 AM

#

every once in a while the setup download can get weird

#

there is a specific way to download them in the pins that might be related, not sure though

indigo star Jun 26, 2025, 6:27 AM

#

Thanks a lot, It was this: https://forums.unrealengine.com/t/upcoming-disruption-of-service-impacting-unreal-engine-users-on-github/1155880/32

Epic Developer Community Forums

Upcoming Disruption of Service Impacting Unreal Engine Users on GitHub

same problem

mellow ridge Jun 26, 2025, 1:42 PM

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Hi , I have issue when package project on linux its showing this error and freeze how to fix it please ?
I'm using source engine 5.5

oak prawn Jun 26, 2025, 10:06 PM

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hello, unsure if this is the right place to ask but in case it is, does anyone have a article or tutorial on how to propperly setup perforce for Unreal? I have it all setup, can upload files and my team mates can download files no problem, however when trying to build through UGS they get all sorts of errors, most recently a Translation error, I have been trying for a couple of weeks but I simply cannot get it to work

smoky goblet Jun 26, 2025, 10:23 PM

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oak prawn hello, unsure if this is the right place to ask but in case it is, does anyone h...

What exactly do you mean “build through UGS”? The build option that is there triggers the same process that building through your IDE does. Can they build that way?
You can check out the pinned comments in #source-control .

oak prawn Jun 26, 2025, 10:26 PM

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My team mate said he was able to build the project with Rider and using the Uproject, but running the build through UGS fails. I did not see there was a dedicated Source channel, sorry

smoky goblet Jun 26, 2025, 11:23 PM

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oak prawn My team mate said he was able to build the project with Rider and using the Upro...

You'll have to share the actual errors that are being reported.

cosmic spindle Jun 27, 2025, 1:58 AM

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Hi, has anyone been able to successfully compile 5.6.0 source?
I'm getting the following errors:

Error C1083 Cannot open include file: '../Plugins/Developer/Concert/ConcertApp/MultiUserClient/Source/MultiUserClient/Private/Widgets/ActiveSession/Replication/Client/Multi/Columns/AssignedClients/MultiStreamColumns_AssignedClients.cpp': No such file or directory

Error C1083 Cannot open compiler generated file: '..\Plugins\VirtualProduction\CaptureManager\CaptureManagerEditor\Intermediate\Build\Win64\x64\UnrealEditor\Development\CaptureManagerEditorSettings\Module.CaptureManagerEditorSettings.cpp.dep.json': No such file or directory

I've downloaded and installed all the VS components as outlined here https://docs.unrealengine.com/en-US/setting-up-visual-studio-development-environment-for-cplusplus-projects-in-unreal-engine/
Downloaded the source code zip and extracted
Ran the setup.bat
Ran the GenerateProjectFiles.bat
Opened the solution in VS, set the solution configuration and platform to Dev Editor - Win64 and attempted to build the UE5 target

Any help would be greatly appreciated 🙂

dusky compass Jun 27, 2025, 11:15 AM

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If you dont need these plugins just axe them

fading gazelle Jun 27, 2025, 5:13 PM

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How much storage do you need to build the editr from source? I have about 250GB left lol.

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not sure if I can exclude the IOS, Android and MAC stuff from the build process

dusky compass Jun 27, 2025, 5:20 PM

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300-500GB but you CAN technically fit it into ~100Gb but it requires some work

fading gazelle Jun 27, 2025, 5:21 PM

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damn lol. are there specific excludes people use to remove the IOS, Android and MAC stuff?

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if i exclude Apple i get build errors despite targeting win64

dusky compass Jun 27, 2025, 5:21 PM

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see pinned

dusky compass Jun 27, 2025, 6:28 PM

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the very first link has exceptions for apple

fading gazelle Jun 30, 2025, 1:43 AM

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So i did the excludes from the pinned and also deleted folders from plugins that had Apple or IOS or Mac in the name, but im hitting this issue

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Is this required?

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I guess it technically is via the RemoteSession Plugin?

heady sparrow Jun 30, 2025, 2:24 AM

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fading gazelle So i did the excludes from the pinned and also deleted folders from plugins that...

instead of building the engine entirely you should just build it with a project that has what you need on it

fading gazelle Jun 30, 2025, 2:35 AM

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so make a project via UnrealBuildTool then build it that way?

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i'd like certain modules to be built Release/Shipping, and link to those, wouldnt i need to build shaderworker or unrealpak separately?

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I'd also like to understand what I did wrong in general. Is deleting items from the plugin folder unsafe?

heady sparrow Jun 30, 2025, 2:40 AM

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fading gazelle so make a project via UnrealBuildTool then build it that way?

the easy way is to just use the launcher binary version

heady sparrow Jun 30, 2025, 2:41 AM

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fading gazelle i'd like certain modules to be built Release/Shipping, and link to those, wouldn...

you can change their optimization levels in the build.cs I guess

heady sparrow Jun 30, 2025, 2:41 AM

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fading gazelle I'd also like to understand what I did wrong in general. Is deleting items from ...

why would it be safe?

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some plugins are enabled by default and required to be around to build

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it might be safe if literally nothing refers to it

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but I would say it's not worth

fading gazelle Jun 30, 2025, 2:42 AM

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yeah i guess i figured apple related stuff wouldnt get in the way of anything

heady sparrow Jun 30, 2025, 2:42 AM

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the most important thing is not just building the ENTIRE engine

#

a project + engine is far far easier and smaller

#

unless you must distribute an engine binary for some reason (probably never)

#

generally your game and engine will be kind of attached at the hip

fading gazelle Jun 30, 2025, 2:43 AM

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So basically dont do UnrealBuildTool.exe UnrealGame Win64 Development?

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an by launcher do you mean the one on the epic game store?

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im referring to this link here:

https://github.com/Kein/build_your_ue?tab=readme-ov-file#skipping-debug-symbols-and-pdb-gen

basiclly i did:

git clone <giturl>

Setup.bat -exclude=WinRT -exclude=Mac -exclude=MacOS -exclude=MacOSX -exclude=osx -exclude=osx64 -exclude=osx32 -exclude=Android -exclude=IOS -exclude=TVOS -exclude=HTML5 -exclude=PS4 -exclude=XboxOne -exclude=Switch -exclude=Dingo -exclude=Win32 -exclude=GoogleVR -exclude=LeapMotion -exclude=HoloLens

GenerateSolutionBat.bat
dotnet build Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.sln -c Release

delete all folders in plugins with Mac, Apple, Android

Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.exe BlankProgram Win64 Development

UnrealBuildTool.exe UnrealGame Win64 Development

heady sparrow Jun 30, 2025, 2:49 AM

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I mean any installed version of the engine, it's just easier to make a project that way

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not sure I would be interested in trying to avoid debug symbols existing

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you kind of need those to do anything in c++

fading gazelle Jun 30, 2025, 2:50 AM

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i was under the impression that the version you install from epic game store does not allow you to modify the engine source

heady sparrow Jun 30, 2025, 2:50 AM

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fading gazelle i was under the impression that the version you install from epic game store doe...

read what I said please, what I mean is that you use the launcher build to create a project

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to add to that: you can right click on the uproject of this dummy project (for your game or just as a dummy project) and then change the engine version to be the source build in the same directory tree

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when I said "you want to build the engine with a project" you kind of have to have a project to build with

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I suppose there are probably some UAT args to make a uproject but I do not see the point when it's simple enough to just make one from another engine install

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I tend to have like 2-3 versions of the engine on my pc at the same time

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how you get the uproject etc doesn't really matter, it's just nicer to use a gui

fading gazelle Jun 30, 2025, 2:57 AM

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im probably still misunderstanding, but I dont have the space to have multiple installations with one version of the source from git, and another from EGS., I'm trying to cut down on space usage. My previous build worked fine when building the game and editor, but I wanted to cutdown more on space so I restarted from scratch. The difference here is the plugin changes i made. Just trying to understand what the issue is regarding the dependency to MetalShaderConvertor and more, and it seems that some default plugin really wants MetalShaderConvertor lol. Eitherway, I appreciate your patience with me.

heady sparrow Jun 30, 2025, 3:12 AM

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fading gazelle im probably still misunderstanding, but I dont have the space to have multiple i...

never said to have multiple source builds here... my main point is to build a game project together with the engine

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building the engine alone is going to waste a lot of space

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the nice thing is that it would no longer need to build this random plugin

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if it wasn't used by default or enabled in the project

fading gazelle Jun 30, 2025, 3:25 AM

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Ah i see. That makes sense

dusky compass Jun 30, 2025, 9:20 AM

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delete all folders in plugins with Mac, Apple, Android
you cant just do that, some programs/plugins/modules have hard requirements to some mac/linux libs even for win64
you also can't just delete a plugin, you will need to follow up the ref chain and delete these plugins that reference it as a dependency

graceful willow Jul 3, 2025, 12:13 AM

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Trying to "Make Installed Build Win64" on a fresh sync of Unreal 5.6.0 from the official Epic Perforce server. Hitting several fairly opaque errors though.
Here is my build command line:

./Engine/Build/BatchFiles/RunUAT.bat BuildGraph -script='Engine/Build/InstalledEngineBuild.xml' -target="Make Installed Build Win64" -set:HostPlatformOnly=true -set:WithDDC=false -set:WithFullDebugInfo=false

First issue is this:

Horde server: 5.6.0-0, agent: 5.6.0-0
** For LiveLinkHub-Win64-Development + UnrealEditor-Win64-DebugGame + UnrealEditor-Win64-Development **
[1/33] Link [x64] UnrealEditor-NNERuntimeORT.dll
Module.NNERuntimeORT.cpp.obj : error LNK2001: unresolved external symbol DXCORE_ADAPTER_ATTRIBUTE_D3D12_GENERIC_ML
..\Plugins\NNE\NNERuntimeORT\Binaries\Win64\UnrealEditor-NNERuntimeORT.dll : fatal error LNK1120: 1 unresolved externals```

Second issue is:

** For UnrealEditor-Win64-DebugGame + UnrealEditor-Win64-Development **
[2/33] Compile [x64] Module.NNERuntimeRDG.2.cpp [RemoteExecutor: ASTRA]

Unhandled Exception: System.IO.FileNotFoundException: The specified module could not be found. (Exception from HRESULT: 0x8007007E)
ASSERT: Unhandled exception/crash. Suppress debugger startup and try to report issue instead. This message is here to hopefully see callstack
CALLSTACK:
uba::Detoured_CreateProcessW (UbaDetoursFunctionsKernelBase.inl:3050)
KERNEL32.dll: +0x78322
KERNEL32.dll: +0x511b2
KERNEL32.dll: +0x7898d
KERNELBASE.dll: +0x11ab6c
ntdll.dll: +0x16925f
ntdll.dll: +0x126b53
ntdll.dll: +0x16623f
ntdll.dll: +0x745d7
ntdll.dll: +0x73466
KERNELBASE.dll: +0xc85ea
clr.dll: +0x181058
ERROR: Process 1540 VCTIP.EXE (C:\HordeAgent\Sandbox\Saved\Uba\sessions\250702_132938\bin\c74eb6f9a94706d723e0cc990740cce5\VCTIP.EXE) not active but did not get exit message. Received 23 messages (GetExitCodeProcess returned 0xe0434352)
c:\vendor\epic\ue5\5.6.0\Engine\Plugins\Experimental\NNERuntimeRDG\Source\NNERuntimeRDG\Private\Tests\NNERuntimeRDGUnitTestOpUnary.cpp(209) : error C4756: overflow in constant arithmetic
while compiling UE::NNERuntimeRDG::Private::Test::UnaryOp::FElementWiseUnaryCPUHelperIsInf::RunTest
[3/33] Compile [x64] Module.AnimNextAnimGraph.4.cpp [RemoteExecutor: ASTRA]
c:\vendor\epic\ue5\5.6.0\Engine\Plugins\Experimental\AnimNextAnimGraph\Source\AnimNextAnimGraph\Private\Traits\BlendStackTrait.cpp(378) : error C4756: overflow in constant arithmetic
while compiling UE::AnimNext::FBlendStackCoreTrait::GetState
[4/33] Compile [x64] Module.AnimNextStateTree.cpp [RemoteExecutor: ASTRA]
c:\vendor\epic\ue5\5.6.0\Engine\Plugins\Experimental\AnimNextAnimGraph\Source\AnimNextAnimGraph\Public\TraitInterfaces\ITimeline.h(123) : error C4756: overflow in constant arithmetic
while compiling UE::AnimNext::FTimelineState::IsFinite
c:\vendor\epic\ue5\5.6.0\Engine\Plugins\Experimental\AnimNextAnimGraph\Source\AnimNextAnimGraph\Public\TraitInterfaces\ITimeline.h(98) : error C4756: overflow in constant arithmetic
while compiling UE::AnimNext::FTimelineState::GetPositionRatio
[5/33] Compile [x64] Module.AnimNextAnimGraph.3.cpp [RemoteExecutor: ASTRA]
c:\vendor\epic\ue5\5.6.0\Engine\Plugins\Experimental\AnimNextAnimGraph\Source\AnimNextAnimGraph\Public\TraitInterfaces\ITimeline.h(123) : error C4756: overflow in constant arithmetic
while compiling UE::AnimNext::FTimelineState::IsFinite
c:\vendor\epic\ue5\5.6.0\Engine\Plugins\Experimental\AnimNextAnimGraph\Source\AnimNextAnimGraph\Public\TraitInterfaces\ITimeline.h(98) : error C4756: overflow in constant arithmetic
while compiling UE::AnimNext::FTimelineState::GetPositionRatio```

Are either of these known issues that any of you have hit?

dusky compass Jul 3, 2025, 12:20 AM

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delete NNERuntimeORT plugin/module

graceful willow Jul 3, 2025, 12:43 AM

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There's a couple dependencies:
Unable to find plugin 'NNERuntimeORT' (referenced via default plugins -> NNEDenoiser.uplugin). Install it and try again, or remove it from the required plugin list.
which I pruned and leaves me only with one dependency from
Plugins/Animation/MLDeformer/VertexDeltaModel on NNERuntimeORT... which seems fishy to have a non-experimental plugin depend on an experimental one. Thanks for putting me on the right path!

graceful willow Jul 3, 2025, 4:53 AM

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I ended up pruning all these to get to a build: Engine/Plugins/Experimental/AnimNext Engine/Plugins/Experimental/AnimNext/Config/BaseAnimNext.ini Engine/Plugins/Experimental/AnimNextAnimGraph Engine/Plugins/Experimental/AnimNextAnimGraph/Config/BaseAnimNextAnimGraph.ini Engine/Plugins/Experimental/AnimNextChooser Engine/Plugins/Experimental/AnimNextControlRig Engine/Plugins/Experimental/AnimNextPoseSearch Engine/Plugins/Experimental/AnimNextStateTree Engine/Plugins/Experimental/AnimNextWarping Engine/Plugins/Experimental/EvaluationNotifies Engine/Plugins/Experimental/MoverAnimNext Engine/Plugins/Experimental/MoverAnimNext/README.md Engine/Plugins/Experimental/MoverAnimNext/Resources/Icon128.png Engine/Plugins/Experimental/MovieSceneAnimMixer Engine/Plugins/Experimental/MovieScenePoseSearchTracks Engine/Plugins/Experimental/NNERuntimeRDG Engine/Plugins/Experimental/RigLogicAnimNext Engine/Plugins/Experimental/RigLogicAnimNext/Resources/Icon128.png Engine/Plugins/NNE/NNERuntimeORT
not sure if I went too far, or if there is another, less destructive way of handling it (like some kind of sidecar configuration file to disable plugins). I really don't like modifying the source if I don't have to.
I've heard that I can make changes just to Engine\Build\InstalledEngineFilters.xml to control these sorts of things but I can't find any definitive documentation on it. ChatGPT keeps suggesting modifications to this file but none of them work 🙃

dusky compass Jul 3, 2025, 8:42 AM

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graceful willow I ended up pruning all these to get to a build: ```Engine/Plugins/Experimental/A...

If you dont plan to use these plugins/their functionality - it does not matter

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it is some animation machine/AI memes

dapper sable Jul 4, 2025, 1:01 PM

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Hi, anyone knows where i can find my save game files in package project? I deleted it from SaveGames inside my project folder and it works normally in editor, but still has saves inside package project

iron dome Jul 4, 2025, 1:03 PM

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In your documents folder somewhere.

dapper sable Jul 4, 2025, 1:05 PM

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Is not, there is some project there, but not what i working with

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I already deleted "savegames" from project folder .../saved/savegames/ and its works on editor, but not if i shipped it again, somehow there is still old saves

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https://forums.unrealengine.com/t/where-are-the-save-slots-in-packaged-projects-on-windows/299603/6

Epic Developer Community Forums

Where are the save slots in packaged projects on Windows?

Nevermind, I just found it. It is in a somewhat different location, but it was Library/Application Support/Epic//Saved/SaveGames

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i found someting like that, but directory doesnt exist

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i search through my entire pc and didn't find anything like that beside my already deleted project folder

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i deleted basiclly everything from project folder like saves/intermediate/datacache, even binaries and generate new ones, then shipped project again, AND AGAIN THERE WAS OLD SAVES.

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so i guess there is something in epic launcher/other directory that i do not know of

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Found it ❤️

dusky compass Jul 4, 2025, 3:10 PM

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not really related to #engine-source , see #packaging

craggy tapir Jul 5, 2025, 5:32 PM

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Morning. Trying to figure out why our sk items are ticking every frame. We set up some not ticking on the BP and only tick when rendered and update rate optimizations in the BP for sk meshes but after doing an insights profile they are still ticking . Any idea why ?

obsidian field Jul 6, 2025, 6:20 PM

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Hi there!
When you have Unreal Engine from source, you can also have these "uproject" (they are tools and can't be opened with UE editor) in the launcher. How can I remove them?

smoky goblet Jul 6, 2025, 6:33 PM

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obsidian field Hi there! When you have Unreal Engine from source, you can also have these "upro...

Generally you don't bother because you don't launch project editors from the launcher. Instead you have your uproject as the startup project in the IDE and launch directly into the Editor. Not launching into the Launcher and then opening the project.

obsidian field Jul 7, 2025, 8:26 AM

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smoky goblet Generally you don't bother because you don't launch project editors from the lau...

Yes, that's right. It's just that we're using the classic engine to sort a ton of assets, we have quite a few projects and I'd have liked it to be clean for the artists.

smoky goblet Jul 7, 2025, 8:56 AM

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obsidian field Yes, that's right. It's just that we're using the classic engine to sort a ton o...

Then I’m not sure there’s anything you can do. Those are projects that shouldn’t be deleted.
Without experience in your workflow, it’s hard to give much advice. Our artists don’t use the launcher for anything. We only use it to migrate FAB content into plugins and the artists use them from there.
Multiple projects are managed using UGS. 99% of the team never sees the launcher (in my experience)

obsidian field Jul 7, 2025, 8:59 AM

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smoky goblet Then I’m not sure there’s anything you can do. Those are projects that shouldn’t...

I see 🤔
I'll see what I can do without it, then, and make them a little program that includes everything they need.

brittle viper Jul 8, 2025, 12:38 AM

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cosmic spindle Hi, has anyone been able to successfully compile 5.6.0 source? I'm getting the f...

having the same issue

brittle viper Jul 8, 2025, 1:52 AM

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cosmic spindle Hi, has anyone been able to successfully compile 5.6.0 source? I'm getting the f...

cloned the repo instead of the release zip and it compiles fine

cosmic spindle Jul 8, 2025, 1:53 AM

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Sorry now seeing this…Yh that’s what worked for me

distant venture Jul 9, 2025, 6:44 AM

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I am trying to build the ue4 docker container on Linux using ue4docker, the command being:

RUN ./Engine/Build/BatchFiles/RunUAT.sh BuildGraph \
    -target="Make Installed Build Linux" \
    -script=Engine/Build/InstalledEngineBuild.xml \
    -set:HostPlatformOnly=true \
    -set:WithClient=true \
    -set:WithDDC={% if excluded_components.ddc == true %}false{% else %}true{% endif %} \
    -set:WithServer=true \
    {{ buildgraph_args }} && \
    rm -R -f /home/ue4/UnrealEngine/LocalBuilds/InstalledDDC

#

I get to this point in the build

#

#12 1744.5 Creating makefile for UnrealServer (no existing makefile)                                                                                                                                                                                                                                                                                        
#12 1744.5 Linux dedicated server is made to depend on FreeType2. We want to avoid this, please correct module dependencies.                                                                                                                                                                                                                                
#12 1744.7 Unable to instantiate module 'FreeType2': Linux dedicated server is made to depend on FreeType2. We want to avoid this, please correct module dependencies.                                                                                                                                                                                      
#12 1744.7 (referenced via allmodules option -> AvalancheDataLink.uplugin -> AvalancheDataLink.Build.cs -> Avalanche.Build.cs -> Text3D.Build.cs) ?

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Any idea why that would be happening? Does 5.6.0 Linux builds all fall over if you use WithServer=true because it sets AllModules?

dusky compass Jul 9, 2025, 10:53 AM

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I dont think you need Avalanche on the server, simply ax the plugin as well as anything that depends on it

sonic zenith Jul 9, 2025, 5:39 PM

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I'm having these errors while trying to build engine source 5.6
I disabled UBA in BuildConfiguration.xml but still getting that same error

    <bAllowUBAExecutor>false</bAllowUBAExecutor>
    <bAllowUBALocalExecutor>false</bAllowUBALocalExecutor>

#

📎 message.txt

graceful willow Jul 9, 2025, 6:29 PM

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sonic zenith I'm having these errors while trying to build engine source 5.6 I disabled UBA i...

If building from inside Visual Studio make sure you are building the right project and solution configuration. What is your 'Startup Project'? What is your 'Solution Configuration'? It looks like whatever you've selected, it's trying to build UbaCore. Your settings in BuildConfiguration.xml just control whether the build system //uses// UBA, not whether it gets build (afaik). It looks like Visual Studio is actually trying to link the UnrealBuildAccelerator project and failing, apparently due to missing dependencies. What build command are you specifically choosing from the build menu?

sonic zenith Jul 9, 2025, 6:30 PM

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I'm building solution with Ctrl+Shift+B, it's set on Development Editor
I'm running Setup.bat and building again to see if it helps

graceful willow Jul 9, 2025, 6:35 PM

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control-shift-b builds the entire solution, you might want to try narrowing the scope of the build with ctrl+b like my highlighted option above. I've definitely run into problems building the entire solution before

sonic zenith Jul 9, 2025, 6:49 PM

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graceful willow control-shift-b builds the entire solution, you might want to try narrowing the ...

oh actually UE5 was already built with no error, it's all good then, thanks a lot!

fair sedge Jul 9, 2025, 8:05 PM

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Any way to use UE5 as a renderer only? I.e. let's say I have my own .exe application which drives physics, simulation etc. And I just wanna tell UE5 what to render, and link it to my .exe as a library. Possible? Or am I asking for too much?

hearty sand Jul 9, 2025, 8:35 PM

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fair sedge Any way to use UE5 as a renderer only? I.e. let's say I have my own .exe applica...

Probably possible, but I would be surprised if you find someone that did that AND documented it.

#

idk if the Elder Scrolls remake did that or not.

graceful willow Jul 9, 2025, 8:57 PM

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fair sedge Any way to use UE5 as a renderer only? I.e. let's say I have my own .exe applica...

You have to decide how to communicate from your custom simulation to unreal -- an external process via sockets/shared memory/something, or embed your custom simulation code within the unreal process itself, most likely as a plugin. Either way you do it, you'll want to spawn an unreal Actor for each renderable scene object you have in your simulation. Then you can do things l ike SetActorTransform() on them per frame. You'll have to make sure and disable default behavior like Actor ticking, physics, and who knows what else.

dusky compass Jul 9, 2025, 9:13 PM

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OBRE was somewhat similar yes

fair sedge Jul 9, 2025, 9:36 PM

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graceful willow You have to decide how to communicate from your custom simulation to unreal -- a...

That much I already have, but I'm struggling over more control over the game loop, inputs, etc. And with the part that my code has to get loaded as a dynamically linked plugin which is not ideal.

distant venture Jul 10, 2025, 4:07 AM

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dusky compass I dont think you need Avalanche on the server, simply ax the plugin as well as a...

https://github.com/EpicGames/UnrealEngine/pull/13392 had the solution

iron dome Jul 10, 2025, 6:39 AM

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Yeah, there's been a push to make sure it works in all different kinds of builds recently.

distant venture Jul 10, 2025, 7:06 AM

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iron dome Yeah, there's been a push to make sure it works in all different kinds of builds...

Nice. It was always a shock to get build issues with linux and does leave me wondering sometimes if I am the only one on Earth that uses it on linux

iron dome Jul 10, 2025, 7:10 AM

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I don't think so. But maybe the only one packaging it with a dedi server!

#

I don't think that issue was specific to Linux.

foggy torrent Jul 10, 2025, 2:41 PM

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am I mistaken in thinking that there's no way to do cel shading in a forward rendered game without engine modifications? since the overlay material / post process based cel shading techniques require the gbuffer, and you can't add new shading model without modifying engine source

distant venture Jul 11, 2025, 12:02 AM

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iron dome I don't think so. But maybe the only one packaging it with a dedi server!

Yeah the ue4-docker scripts build UnrealServer as part of its Installed Build target

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I don't actually use it for anything at this point

last anvil Jul 13, 2025, 6:06 PM

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I posed this over in cpp but I've realized it might be more relevant here

dusky compass Jul 13, 2025, 6:50 PM

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not really relevant here, fulldebuginfo IIRC simply produces PDBs with private info, the shipping build will still have some code optimzied out

smoky goblet Jul 13, 2025, 7:09 PM

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last anvil

a locally made installed build? or a launcher build?

last anvil Jul 13, 2025, 7:55 PM

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Locally made. I used the command in that message to generate the build.

smoky goblet Jul 13, 2025, 8:19 PM

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last anvil Locally made. I used the command in that message to generate the build.

Curious. Agree with Kazekai that at least some of it can be explained by optimization settings. Callstack issue isn’t something I’ve seen before except when debugging dumps and the symbols aren’t actually loaded yet.

last anvil Jul 13, 2025, 8:33 PM

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This is what feels super odd to me

I have my source cloned to P:\UnrealEngine-Angelscript

If I make an installed build to P:\UnrealEngine-Angelscript\LocalBuilds\Engine\Windows and set a breakpoint for example in

P:\UnrealEngine-Angelscript\LocalBuilds\Engine\Windows\Engine\Plugins\Editor\EngineAssetDefinitions\Source\Private\Animation\AssetDefinition_AnimSequence.cpp

The breakpoint appears to catch in

P:\UnrealEngine-Angelscript\Engine\Plugins\Editor\EngineAssetDefinitions\Source\Private\Animation\AssetDefinition_AnimSequence.cpp

without a callstack, which to me looks like it's catching in the source build and not in the binary build

#

The test project I'm using is being pointed at the binary build in there. I've tried the same thing with the build not being nested like this, I was just making an updated build and figured I would attempt to address this before I started packaging it up. I've sort of been ignoring this issue up until this point.

#

When looking in the xml config the only thing I can find referencing debug settings is the full debug info option

                <Case If="'$(WithFullDebugInfo)' == true">
                    <!-- Copy files for local debug builds -->
                    <Copy Files="#UnrealEditor Win64 Unstripped" From="$(RootDir)" To="$(SavedOutput)"/>
                </Case>
                <Default>
                    <!-- Otherwise, strip the files for distribution -->
                    <Strip BaseDir="$(RootDir)" OutputDir="$(SavedOutput)" Platform="Win64" Files="#UnrealEditor Win64 Unstripped" Tag="#UnrealEditor Win64 Stripped"/>
                </Default>
            </Switch>```

last anvil Jul 13, 2025, 8:45 PM

#

dusky compass not really relevant here, fulldebuginfo IIRC simply produces PDBs with private i...

Do I need to build the engine itself under an alternate configuration or something? I'm not sure what build config UAT is using under here. It feels like this should be easy, my understanding is this is the process by which epic genreates launcher builds and it's worked for me there before.

fair sedge Jul 15, 2025, 12:58 AM

#

fair sedge Any way to use UE5 as a renderer only? I.e. let's say I have my own .exe applica...

I figured out that there's the whole "UELibrary" module, which does compile UE as a .dll, which is provided an external window, and is ticked by the caller, which is pretty cool.
But this startups a pretty bare game window, even though it built this whole "UELibraryProjectEmbeddedEditor" taking up 830MBs, with the UELibraryApp.exe linking to it.
So, does anyone know how to get the actual editor running? Preferably with multiple windows ?
I'm asking out of curiosity mostly, since now at the least I can, run the editor and redirect the PIE button to actually run my game as a separate process, which is a huge improvement.

manic flame Jul 16, 2025, 8:11 AM

#

Hello, do you guys have a fix for EngineAssociation when collab ?

radiant chasm Jul 16, 2025, 10:05 AM

#

Anyone know where UEPrereqSetup_x64.exe went? It used to be in \Engine\Extras\Redist\en-us until 5.5 but in 5.6 it's gone.

wise basin Jul 16, 2025, 8:18 PM

#

after a change to a *.cs file in your project, do you have to regenerate always? e.g. ./Source/MyProjectClient.Target.cs or ./Source/MyProjectServer.Target.cs?

hidden hedge Jul 16, 2025, 9:00 PM

#

depends, but generally yes

#

not sure why that's an #engine-source question though

dusky compass Jul 16, 2025, 9:02 PM

#

if you want to just build then no

hidden hedge Jul 16, 2025, 9:04 PM

#

yeah that just runs UBT but if you want VS to actually see the changes, you have to

small surge Jul 17, 2025, 3:07 PM

#

trying to backport the gradle upgrade from 5.5 to 5.4 but I get these errors

UATHelper: Packaging (Android (ASTC)): Y:\app\src\main\java\com\google\android\vending\licensing\LicenseChecker.java:31: error: package com.android.vending.licensing does not exist
UATHelper: Packaging (Android (ASTC)): import com.android.vending.licensing.ILicenseResultListener;
UATHelper: Packaging (Android (ASTC)): > Task :app:compileReleaseJavaWithJavac FAILED
UATHelper: Packaging (Android (ASTC)):                                     ^
UATHelper: Packaging (Android (ASTC)): Y:\app\src\main\java\com\google\android\vending\licensing\LicenseChecker.java:32: error: package com.android.vending.licensing does not exist
UATHelper: Packaging (Android (ASTC)): import com.android.vending.licensing.ILicensingService;
UATHelper: Packaging (Android (ASTC)):                                     ^
UATHelper: Packaging (Android (ASTC)): Y:\app\src\main\java\com\google\android\vending\licensing\LicenseChecker.java:70: error: cannot find symbol
UATHelper: Packaging (Android (ASTC)):     private ILicensingService mService;
UATHelper: Packaging (Android (ASTC)):             ^
UATHelper: Packaging (Android (ASTC)):   symbol:   class ILicensingService
UATHelper: Packaging (Android (ASTC)):   location: class LicenseChecker
UATHelper: Packaging (Android (ASTC)): Y:\app\src\main\java\com\google\android\vending\licensing\LicenseChecker.java:221: error: package ILicenseResultListener does not exist

delicate latch Jul 17, 2025, 8:16 PM

#

Very new to unreal, mostly just looking around as engineering curiosity. I was confused when playing around with 5.6 Parrot Sample game what the "default HUD" was and why it wasn't respecting bShowHud.

Poked around and found it has a check here only to render HUD when NM_Client. So I tried changing network mode for PIE and then I found that within SpawnDefaultHUD it's not passing this null check, (at least in PIE).

What's up here? Is "default HUD" something that is never actually used in practice, and I just got curious looking at a stale path, or am I misunderstanding something fundamental?

dusky compass Jul 17, 2025, 9:33 PM

#

I think it is a leftover from UT, usually people make their own HUD system and control directly
You can modify the check to run on both Standalone or Client if you want or just spawn manually

delicate latch Jul 17, 2025, 9:43 PM

#

Do people generally not inherit from AHUD?

dusky compass Jul 17, 2025, 11:00 PM

#

some do, some dont

molten field Jul 18, 2025, 9:09 AM

#

Which branch has ue5.7 features

hidden hedge Jul 18, 2025, 9:19 AM

#

molten field Which branch has ue5.7 features

There was someone else going on about this. There isn't a special early access version of 5.7 or anything like that, you have ue5-main, which is always going to be the development trunk for the next version (5.7 in this case)

void owl Jul 18, 2025, 11:57 AM

#

hidden hedge There was someone else going on about this. There isn't a special early access v...

General structure on github is:

release -> latest release, stable, should be used by most people
X.Y -> specific branch for given release of unreal, shows up when the version is close to being released (usually a month or at least couple of weeks before release) - after initial release usually contains WIP changes for next patch
dev-X.Y -> sometimes there's also dev-X.Y branch, containing even more WIP changes but am not really sure what's the difference between dev and non-dev numbered release
ue5-main -> latest and greatest (and the most broken), where day-to-day development happens... right now 5.7 - this is also the version used by fortnite etc... and it's heavily work-in-progress...

so technically speaking, when it's almost time to release 5.7, there will be "early access" branch which will eventually become release... but yeah...

molten field Jul 18, 2025, 4:00 PM

#

hidden hedge There was someone else going on about this. There isn't a special early access v...

what ue5-early-access

hidden hedge Jul 18, 2025, 4:01 PM

#

pre-5.0

molten field Jul 18, 2025, 4:03 PM

#

hidden hedge pre-5.0

thanks

past torrent Jul 20, 2025, 2:34 AM

#

Hey all, I've compiled UE from source on Linux a few times now but cannot for the life of me get it to work on Windows.
The engine builds without any errors, starts up, and allows me to create a project, but then when trying to open that project suddenly exits. The problem is, there's no error info. Everything exits with code 0.

I get to here

[2025.07.20-01.57.23:573][566]Running C:/UEAS_Source/Engine/Build/BatchFiles/Build.bat  -projectfiles -project="C:/Unreal Projects/Test/Test.uproject" -game -engine -progress
[2025.07.20-01.57.23:681][566]Using bundled DotNet SDK version: 8.0.300 win-x64
[2025.07.20-01.57.24:486][566]Building UnrealBuildTool...
[2025.07.20-01.57.25:896][566]
[2025.07.20-01.57.25:896][566]Build succeeded.
[2025.07.20-01.57.25:896][566]    0 Warning(s)
[2025.07.20-01.57.25:896][566]    0 Error(s)
[2025.07.20-01.57.25:896][566]
[2025.07.20-01.57.25:896][566]Time Elapsed 00:00:01.30

All seems well. It generates some Visual Studio project files, succeeds, and then just exits:

[2025.07.20-01.57.40:001][566]Result: Succeeded
[2025.07.20-01.57.40:001][566]Total execution time: 12.61 seconds
'UnrealEditor.exe' (Win32): Loaded 'C:\Windows\System32\coml2.dll'. Symbol loading disabled by Include/Exclude setting.
'UnrealEditor.exe' (Win32): Unloaded 'C:\Windows\System32\coml2.dll'
'UnrealEditor.exe' (Win32): Loaded 'C:\Windows\System32\coml2.dll'. Symbol loading disabled by Include/Exclude setting.
'UnrealEditor.exe' (Win32): Loaded 'C:\Windows\System32\sxs.dll'. Symbol loading disabled by Include/Exclude setting.
'UnrealEditor.exe' (Win32): Unloaded 'C:\Windows\System32\sxs.dll'
'UnrealEditor.exe' (Win32): Loaded 'C:\Windows\System32\sxs.dll'. Symbol loading disabled by Include/Exclude setting.
[2025.07.20-01.57.40:677][566]LogStall: Shutdown...
[2025.07.20-01.57.40:678][566]LogStall: Shutdown complete.
[2025.07.20-01.57.40:697][566]LogSlate: Window 'Unreal Project Browser' being destroyed
[2025.07.20-01.57.40:711][566]Cmd: QUIT_EDITOR

Every line after this is just logs of it shutting down.

I dug through messages here going back to 2020 and someone mentioned that there should be something above the QUIT_EDITOR message, but I can't find anything there. Just successful build steps.
I don't even need a solution, just any help for where to look next or what to try as I really am not sure.

I'm building in Visual Studio, and have installed all the dependencies listed here:
https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-5-6-release-notes

I'm running Windows 10
VS Version 17.14.9 (July 2025)
And clang --version in a command prompt says 19.1.5.

Thanks so much in advance for any help or ideas you might have

past torrent Jul 20, 2025, 2:52 AM

#

Hey all, I've compiled UE from source on

spring solstice Jul 21, 2025, 3:14 AM

#

How do I contact Epic Games by email?

iron dome Jul 21, 2025, 7:09 AM

#

For what?

runic dune Jul 21, 2025, 7:17 AM

#

Hi, could you please tell me how to include the levels I split into sub-levels in the game build? In the packaged build they don't load — I just get a black screen, but everything works fine in the editor.
I added them here and built the game, but the Persistent Level and sub-levels don't work.

dusky compass Jul 21, 2025, 7:03 PM

#

#packaging

spring solstice Jul 21, 2025, 8:38 PM

#

iron dome For what?

Licensing a custom game engine. I have decided that I want to do so for my own game as well.

#

But I cannot find a way to do that in the Unreal Engine website.

iron dome Jul 21, 2025, 8:39 PM

#

You can get and modify the UE source however you like. Just sign up on github and link your account.

#

No custom licence required.

#

Unless you have some specific requirements?!

delicate latch Jul 21, 2025, 9:26 PM

#

Doing some more educational code spelunking.. anyone offhand know where HitProxyConsumer is actually used? (and what it's for?) Seems to be a constructor param for Canvas and PDI, but I'm not seeing any call sites across the engine that actually use it. Seems always to be set up null and unused

iron dome Jul 21, 2025, 9:29 PM

#

It's for mouse clicks on the viewport.

#

So an actor can define its area on the viewport and register clicks there.

delicate latch Jul 21, 2025, 9:29 PM

#

Thought that was HitProxy

iron dome Jul 21, 2025, 9:30 PM

#

Oh Consumer

delicate latch Jul 21, 2025, 9:30 PM

#

yeah like here FMeshProjectionPassProcessorBase

#

er

#

https://github.com/EpicGames/UnrealEngine/blob/a9a5fa39db7465c2ce3dc48f07ce999f08f7bf0a/Engine/Source/Runtime/Renderer/Private/DynamicPrimitiveDrawing.inl#L31

#

InHitProxyConsumer. i'm surfing around everywhere and EVERYWHERE i can find it's always null.

#

wondering if it's just a dead concept

#

i could be missing references for other platforms tho, only using rider on windows

#

and i'm a donkey

iron dome Jul 21, 2025, 9:32 PM

#

It's used in an internal debug service 😄

delicate latch Jul 21, 2025, 9:32 PM

#

haha know which file? i'm obviously curious

#

i saw one but then it was like almost a noop struct

#

seemed like it was nothing

#

also as per normal, this and any subsequent questions from me about UE5 source have no practical value.

iron dome Jul 21, 2025, 9:34 PM

#

They'll be useful one day!

#

It's used in the rendering code too apparently via the FHitProxyMap class.

delicate latch Jul 21, 2025, 9:34 PM

#

I think that was for HitProxies proper, not the consumer

iron dome Jul 21, 2025, 9:34 PM

#

It extends from consumer

delicate latch Jul 21, 2025, 9:34 PM

#

(this was all because I was curious how widgets get clicks)

#

oh interesting

#

but I guess with regard to canvas/PDI it's not in use

iron dome Jul 21, 2025, 9:38 PM

#

Possibly not!

delicate latch Jul 21, 2025, 9:38 PM

#

Cool cool! thanks for peeking with me 🙂

iron dome Jul 21, 2025, 9:38 PM

#

Np

#

I'm always curious about random UE engine stuff!

#

I always forget it a moment later, but still...

delicate latch Jul 21, 2025, 9:41 PM

#

yeah definitely. I've always had it in the back of my head to make a game, been thinking more seriously now about cloning the game "Muck". But instead of doing anything I'm more curious now about how all UE5 works. Got a good grasp now what it's doing with UHT, where it spawns render thread, and most things at a super high level.... so now I may actually have to make something :_(

last anvil Jul 21, 2025, 9:49 PM

#

I'm running into an issue when using an installed build where I can't seem to debug engine level code. Breakpoints there don't hit and when I get a crash callstack anything outside of my code is omitted from the call stack. Here's the command I've used to generate the installed build. The pdb files all appear to be present but they don't appear to be working. Is there another build flag I should be setting??

 -set:WithDDC=false^
 -set:HostPlatformOnly=true^
 -set:WithFullDebugInfo=true^
 -set:AllowParallelExecutor=true```

dusky compass Jul 22, 2025, 12:38 AM

#

I dont think it is related to the flags, it is not the answer you want but if you desire ot iterate and debug on engine code you better work with direct source build in-place

spring solstice Jul 22, 2025, 7:50 AM

#

iron dome You can get and modify the UE source however you like. Just sign up on github an...

Even if I want to use mod tools?

iron dome Jul 22, 2025, 7:50 AM

#

Depends on the mod tools.

#

What exactly do you want to do?

#

You can't just distribute copies of the engine, but I believe you can make them available on the egs or fab or something.

#

I don't know about that specifically.

spring solstice Jul 22, 2025, 7:51 AM

#

I just want to make a puzzle game but I think I need to use the engine for custom level editing.

dark sinew Jul 22, 2025, 10:11 AM

#

📎 generateprojectfilesbatlog.txt

#

discord cant show the entire thing in the message

hidden hedge Jul 22, 2025, 10:47 AM

#

dark sinew

and what do you have configured in "Package Sources" in Tools -> Options inside VS?

#

https://api.nuget.org/v3/index.json should at least be there

desert moth Jul 22, 2025, 1:46 PM

#

Hi, I'll try here too... We just upgraded to Unreal 5.6, and I'm trying to get my build setup to compile a linux dedicated server using clang-18.1, but all I get is a bunch of these
...
fatal error: 'type_traits' file not found
...
I've tried a couple of different things, but I'm kinda stuck now?
Anyone have any insight?

spring solstice Jul 23, 2025, 5:49 AM

#

How do I even contact them?

dusky compass Jul 23, 2025, 11:12 AM

#

you usually dont unless you are fairly big dev/publisher

dark sinew Jul 24, 2025, 7:26 PM

#

hidden hedge `https://api.nuget.org/v3/index.json` should at least be there

hey sorry for the late reply, but thats exactly whats configured in the nuget package manager

fading dagger Jul 24, 2025, 11:19 PM

#

https://issues.unrealengine.com/issue/UE-215992

Unreal Engine

The Unreal Engine Issues and Bug Tracker

Welcome to the Unreal Engine Issue and Bug Tracker. You can check the status of an issue and search for existing bugs. See latest bug fixes too.

#

Anyone have a fix for child sparse objects?

#

kinda annoying that on editor startup the sparse data is null

#

any bp that uses it needs a force bp compile otherwise anything that access the sparse data will crash with a null ptr. Seems to be a reflection issue related where the code isn't loaded into the side car structure during editor startup however forcing a BP compile does instantiate it

robust night Jul 29, 2025, 10:18 AM

#

this is fine?

#

all the ispc shit is angry

dusky compass Jul 29, 2025, 10:47 AM

#

does it look fine?

hidden hedge Jul 29, 2025, 10:52 AM

#

I guess "fatal error" is somehow not strongly worded enough

nova talon Aug 1, 2025, 9:50 AM

#

Hey gamers, I started having an issue that I can't really diagnose: I was working on a keybind menu and in the process enabled EnhancedInputUserSettings to read the key profiles. After enabling, the editor launched in debug mode, hit my breakpoints, showed the key profiles fine. I closed the editor, tried to relaunch and now every time I try to launch in debug it compiles fine then excepts with the following stack: TConstSetBitIterator::FindFirstSetBit() BitArray.h:1998 [Inlined] TConstSetBitIterator::operator++() BitArray.h:1953 [Inlined] TSparseArray::TBaseIterator::operator++() SparseArray.h:961 TSet::Rehash() Set.h:1443 [Inlined] TSet::ConditionalRehash(int, EAllowShrinking) Set.h:1418 [Inlined] TSet::RehashOrLink(unsigned int, TSetElement<…> &, int) Set.h:608 TSet::Emplace<…>(TPairInitializer<…> &&, bool *) Set.h:635 [Inlined] TMapBase::Emplace(int &&, FString &&) Map.h:450 [Inlined] TMapBase::Add(int &&, FString &&) Map.h:411 UE::UnifiedError::FErrorRegistry::RegisterModule(const TStringView<…> &) UnifiedError.h:512 UE::UnifiedError::StreamableManager::`dynamic initializer for 'StaticModuleId''() StreamableManagerError.h:8
Interestingly, the editor will still compile and launch in regular mode, key profiles remain accessible on testing so I'm not sure it's a problem with the UserSettings

I've re-pulled and rebuilt the engine and the problem persists. I can't find any logs related to this in Saved/Crashes in either my project folder or the engine.

Unreal Engine 5.6 (source build from GitHub)
Windows 11
NVIDIA RTX 3080Ti (Driver 577.0.0)

nova talon Aug 1, 2025, 1:09 PM

#

Well against my better judgement I tried to compile and launch in debug through Visual Studio and it worked fine. Points to a Rider problem but still not sure what to do

hidden hedge Aug 1, 2025, 1:43 PM

#

Rider is not a compiler and just uses MSVC. Not sure if you stumbled across a very weird debugger bug (Rider uses its own build of lldb for debugging)

thick furnace Aug 1, 2025, 1:56 PM

#

nova talon Hey gamers, I started having an issue that I can't really diagnose: I was workin...

wdym. is than an exception or breakpoint

#

lldb panel doesn't show anything usable. maybe smth in output

#

also - turn off call stack filtering. it hides a lot of important things. normally you should never hide frames

nova talon Aug 1, 2025, 2:29 PM

#

Sorry, a lot of this side of things is over my head. It was an exception, I meant my own breakpoints that I was debugging worked, confirming Debug mode was working fine until I restarted the editor

Turned off the filtering and threw a breakpoint in the engine code, there's a PackageLoadFailed error for the StreamableManager module 🤔

thick furnace Aug 1, 2025, 2:32 PM

#

try finding what package it is

nova talon Aug 1, 2025, 2:32 PM

#

Oh it's not the StreamableManager package?

#

I guess that's called a module isn't it

thick furnace Aug 1, 2025, 2:33 PM

#

took a while to open image, yea

thick furnace Aug 1, 2025, 2:36 PM

#

nova talon Sorry, a lot of this side of things is over my head. It was an exception, I mean...

whats in log output

#

last lines

#

there should be UE_LOG(LogStreamableManager, Log, TEXT("Failed attempt to load %s"), *TargetName.ToString());

nova talon Aug 1, 2025, 2:46 PM

#

I can't seem to find it, UE log is empty, debugger output is the same as before. I reinstalled Rider with no change. Launching Debug in VS still works, nothing about the StreamableManager in the logs

thick furnace Aug 1, 2025, 2:47 PM

#

so nothing in debugger Console or Output panel?

nova talon Aug 1, 2025, 3:12 PM

#

Unless I'm misunderstanding where those panels are, no

unkempt aspen Aug 3, 2025, 12:46 PM

#

Anyone knows path to this icon?

drifting niche Aug 3, 2025, 5:42 PM

#

when i press Build in VS code it is taking like 10+ hours for it to build the engine from source. Has anyone else seen it take this long. Im seeing in the docs it should take 10 to 40 minutes?

smoky goblet Aug 3, 2025, 5:53 PM

#

drifting niche when i press Build in VS code it is taking like 10+ hours for it to build the en...

It all depends on the capability of your machine or machines. My laptop can take a couple hours for a full rebuild, but at work we have UnrealBuildAccelerator which can distribute the load to a few machines and it goes faster.

drifting niche Aug 3, 2025, 5:54 PM

#

smoky goblet It all depends on the capability of your machine or machines. My laptop can take...

I have a mid to high tier gaming pc. so I dont know what would cause it to verify files so slow

smoky goblet Aug 3, 2025, 5:59 PM

#

Does the log indicate anything when you build? Like that it's only building using 1 thread or something? or that you're building the wrong thing?
(it's a common mistake to build the solution instead of the game, which will build more than you need)
I'm not sure what verification you're talking about.

drifting niche Aug 3, 2025, 6:01 PM

#

smoky goblet Does the log indicate anything when you build? Like that it's only building usin...

as far as i know, which I'm very new to this so i could definitely be doing something wrong. https://dev.epicgames.com/documentation/en-us/unreal-engine/building-unreal-engine-from-source#runningtheeditor I am following these docs to the T. I cloned the 5.6 engine from the git hub. Then started this doc

Epic Games Developer

Building Unreal Engine from Source | Unreal Engine 5.6 Documentatio...

Compiling Unreal Engine from source code.

smoky goblet Aug 3, 2025, 6:09 PM

#

drifting niche as far as i know, which I'm very new to this so i could definitely be doing some...

Post the start of the build log.

drifting niche Aug 3, 2025, 6:10 PM

#

📎 message.txt

#

i canceled this one manually because I started from scratch this morning to see if it was something i did in the process. but it still is going as slow as yesterday

smoky goblet Aug 3, 2025, 6:12 PM

#

Yeah, that doesn't look right. You're using Visual Studio, right? Is your game project set as the startup project?

drifting niche Aug 3, 2025, 6:16 PM

#

smoky goblet Yeah, that doesn't look right. You're using Visual Studio, right? Is your game p...

not yet, the docs say to do that after the build is done

smoky goblet Aug 3, 2025, 6:16 PM

#

Yeah, you can build before you do that step but it's not really required. It's probably more of a check before building your game.
Even after setting the startup project you can still build the other things or the full solution if you need to.
So I'd skip right down to that part

drifting niche Aug 3, 2025, 6:17 PM

#

smoky goblet Yeah, you _can_ build before you do that step but it's not really required. It's...

ok i set it, should i try to rebuild?

smoky goblet Aug 3, 2025, 6:19 PM

#

Swap to debuggame editor first. That'll save you a rebuild in the future since that's the configuration that's better for development. Epic code is still optimized, but your code is debug.

drifting niche Aug 3, 2025, 6:20 PM

#

smoky goblet Swap to debuggame editor first. That'll save you a rebuild in the future since t...

📎 message.txt

#

thats the current start working

#

its still just as slow

smoky goblet Aug 3, 2025, 6:27 PM

#

that log still doesn't look quite right.

#

one second

drifting niche Aug 3, 2025, 6:27 PM

#

I canceled that one

smoky goblet Aug 3, 2025, 6:32 PM

#

This is what your toolbar should look like before you build.

drifting niche Aug 3, 2025, 6:32 PM

#

should i change it to DebugGame?

smoky goblet Aug 3, 2025, 6:34 PM

#

Yeah, otherwise your editor will be super slow/unresponsive.
You also want to change the UE5 to your game project. It might not be set as the startup project correctly.

drifting niche Aug 3, 2025, 6:48 PM

#

smoky goblet Yeah, otherwise your editor will be super slow/unresponsive. You also want to ch...

this is getting so frustrating. I wish there was clear documentation on this

smoky goblet Aug 3, 2025, 6:51 PM

#

What sort of dev experience do you have? I don't recall having any issues following that documentation what I set mine up.
The build times can be frustrating and it was one reason I bought a new laptop, though it sounds like you should have a beefy enough machine already.

drifting niche Aug 3, 2025, 6:59 PM

#

smoky goblet What sort of dev experience do you have? I don't recall having any issues follow...

all of my experience is in front end stuff. all of this back end stuff is brand new to me and im out of my depth it seems

smoky goblet Aug 3, 2025, 7:03 PM

#

keep at it, you'll get there.
Maybe swap to using the installed build? The engine source build is another step more complicated than "normal" dev.

drifting niche Aug 3, 2025, 7:04 PM

#

smoky goblet keep at it, you'll get there. Maybe swap to using the installed build? The engin...

I appreciate your time in helping. Ill get it eventually

spark hamlet Aug 4, 2025, 12:19 AM

#

My source build of the engine (5.4) all of the sudden would randomly invalidate previously built development binaries. Previously it would only have to build some 2k files once per configuration unless I clear intermediate or do something else the source, but recently I've been making changes only to a UE project and after one small change in a project script suddenly 2k engine files are being rebuilt, when it just before only had a few project files to build, same configuration. What's going on?

gusty ember Aug 4, 2025, 1:57 AM

#

spark hamlet My source build of the engine (5.4) all of the sudden would randomly invalidate ...

you probably did something with engine files or your startup item is not your project in visual studio

#

ctrl+b will build your project.
ctrl+shift+b will build the solution in which engine is also involved

#

also visual studio has a bug, if you click Rebuild Survive it will rebuild the engine also
so always use ctrl+b to build your project

spark hamlet Aug 4, 2025, 2:06 AM

#

I usually click "start debugging" which should build anything thats been changed, I know "build solution" would build the engine too as it shows as a project in the VS solution

#

if I want to build manually I build the project itself

gusty ember Aug 4, 2025, 2:08 AM

#

spark hamlet I usually click "start debugging" which should build anything thats been changed...

start debugging is fine, it just loads the project once build finished
what is your target item in visual studio?

#

should be your project

spark hamlet Aug 4, 2025, 2:09 AM

#

the target was dev editor. Right now tho im working off 5.4 from epic games so I don't have to wait around, trying to fix an issue with no hint as to where in my code its caused

#

Specifically, project is called LaserTag, set to dev editor. There are different project configs for dedicated server and what not but those would error if I try to load in editor anyways

gusty ember Aug 4, 2025, 2:10 AM

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dev editor is build settings not item target

gusty ember Aug 4, 2025, 2:11 AM

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spark hamlet Specifically, project is called LaserTag, set to dev editor. There are different...

one thing is confirmed, if you build your project it will not build the engine if you already builded the engine

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engine will only be building if you change engine files or binary corrupted

spark hamlet Aug 4, 2025, 2:13 AM

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yeah it shouldnt, yet I've been observing it building part of the engine

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I'm moving the source build to a newer ssd, thinking it could be file corruption

gusty ember Aug 4, 2025, 2:15 AM

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spark hamlet I'm moving the source build to a newer ssd, thinking it could be file corruption

do you have pubg installed?

spark hamlet Aug 4, 2025, 2:15 AM

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no...?

gusty ember Aug 4, 2025, 2:15 AM

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hmm, pubg also interact with unreal editor

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few days ago my project start to build all those 6k engine shaders because i installed pubg on my dev pc

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people saying that it changes the editor config files and this cause the editor to recompile shaders

spark hamlet Aug 4, 2025, 2:20 AM

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yeah but shader compilation is different, changing project render settings or even updating graphics drivers can cause the shaders to recompile

spark hamlet Aug 4, 2025, 2:42 AM

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Build started at 8:41 PM...
1>------ Build started: Project: LaserTag (Games\LaserTag\LaserTag), Configuration: Development_Editor x64 ------
Failed to restore A:\UE5_projects\LaserTag 5.0\Build\PLT_Beta.Automation\PLT_Beta.Automation.csproj (in 2 ms).
NuGet package restore failed. Please see Error List window for detailed warnings and errors.
1>Using bundled DotNet SDK version: 6.0.302
1>Running UnrealBuildTool: dotnet "..\..\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll" -Target="LaserTagEditor Win64 Development -Project=\"A:\UE5_projects\LaserTag 5.0\LaserTag.uproject\"" -Target="ShaderCompileWorker Win64 Development -Quiet" -WaitMutex -FromMsBuild -architecture=x64
1>Log file: B:\UnrealEngine\Engine\Programs\UnrealBuildTool\Log.txt
1>Using 'git status' to determine working set for adaptive non-unity build (B:\UnrealEngine).
1>Creating makefile for LaserTagEditor (.uproject file is newer)
1>Parsing headers for LaserTagEditor
1>  Running Internal UnrealHeaderTool "A:\UE5_projects\LaserTag 5.0\LaserTag.uproject" "A:\UE5_projects\LaserTag 5.0\Intermediate\Build\Win64\LaserTagEditor\Development\LaserTagEditor.uhtmanifest" -WarningsAsErrors
1>Total of 0 written
1>Reflection code generated for LaserTagEditor in 2.4674368 seconds
1>Building LaserTagEditor and ShaderCompileWorker...
1>Using Visual Studio 2022 14.38.33145 toolchain (B:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130) and Windows 10.0.22621.0 SDK (B:\Program Files (x86)\Windows Kits\10).
1>Determining max actions to execute in parallel (8 physical cores, 16 logical cores)
1>  Executing up to 8 processes, one per physical core
1>Using Parallel executor to run 2587 action(s)
1>------ Building 2587 action(s) started ------
1>** For LaserTagEditor-Win64-Development **

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could be because it wants to build ShaderCompileWorker for some reason, its rebuilding engine components

rose pollen Aug 5, 2025, 9:44 AM

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Hi!

I have strange issue: During development of my C++ game, everytime i just simply peak at some Unreal internal function definition (ctrl+right click) in Visual Studio, it forces the next build to rebuild massive chunk of the engine (3k-4k modules). I don't touch the Unreals code, no edits are being made, its a simple peak at headers that makes my next build run horribly longer. Does it detect looking and changes the state of files based on it? Sounds like quantum physics 😄

thick furnace Aug 5, 2025, 10:32 AM

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rose pollen Hi! I have strange issue: During development of my C++ game, everytime i just s...

make sure you don't have any extensions that autosave all files or like whitespace-fixer that automatically remove trailing whitespaces in file

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try pay attention to tilestamp of file you open

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and compare

rose pollen Aug 5, 2025, 11:12 AM

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thanks!

heady sparrow Aug 6, 2025, 12:46 AM

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Use source control and consider making engine source files read only

rose pollen Aug 6, 2025, 7:44 AM

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heady sparrow Use source control and consider making engine source files read only

oh making it read only is a great tip, when I check with git status nothing is changed besides UnrealBuildAccellerator directory and some untracked dirs

heady sparrow Aug 6, 2025, 7:45 AM

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UnrealBuildAccellerator settings changing could also trigger a full rebuild I think

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if they are build settings that change the target? I'm not certain as to the rules there but messing around with the build settings xml tends to require a full rebuild ime

rose pollen Aug 6, 2025, 7:49 AM

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Only those two LFS files were changed UbaDetours.exp , UbaHost.exp and i didnt change them by hand

heady sparrow Aug 6, 2025, 7:49 AM

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probably just stuff missed by the gitignore then

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I have no clue what a dot exp even is

cyan acorn Aug 6, 2025, 1:53 PM

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hey, how do I run the tests for Unreal Build Tool? I have a custom change that I want to make sure works.

teal walrus Aug 8, 2025, 12:28 PM

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Hello! I am hoping to find someone who has had experience with creating global shaders through scene view extensions. I was almost able to get a simple shader running (literally just rendering a single color as a sanity check), but I have a runtime error stating that the pipeline could not be created and fatal shader compilation. Upon digging deeper with the debugger, I discovered that SceneColor's resources were null. I suspect it could be that SceneColor isn't fully available at PrePostProcess (which is what the tutorial outlined), hence now I am looking into Post Process hooks to correctly plug my shader at the Tonemapping pass. It would be great to find some fellow devs who have tinkered with this stuff before and to know if I'm on the right track!

twin grail Aug 10, 2025, 1:56 AM

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Hello! I've never used Unreal before but am trying to write a uasset+uexp file parser for datamining and learning purposes. I've made decent progress so far but could really benefit from talking to someone more familiar with these file formats and how to actually interpret the bytes they contain. If anyone has this kind of knowledge and would be kind enough to enlighten me, my DMs are open. Thanks!

iron dome Aug 10, 2025, 9:03 AM

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Pretty sure that'd be against the rules here.

dusky compass Aug 10, 2025, 9:45 AM

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Which rule would that be?

dusky compass Aug 10, 2025, 9:48 AM

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twin grail Hello! I've never used Unreal before but am trying to write a `uasset`+`uexp` fi...

you literally have the source

iron dome Aug 10, 2025, 12:56 PM

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dusky compass Which rule would that be?

It's not exactly piracy, but it's definitely something I doubt the developers want you doing or they'd have made the information available. It'd also be the first steps to pirating assets by reverse engineering the file format and extracting data to rebuild assets.

dusky compass Aug 10, 2025, 12:57 PM

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which rule

iron dome Aug 10, 2025, 12:58 PM

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Well I mentioned piracy.. so the piracy one?

dusky compass Aug 10, 2025, 12:58 PM

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So he is pirating his own assets from example project?

iron dome Aug 10, 2025, 12:59 PM

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Where did he mention the example project or his own project?

dusky compass Aug 10, 2025, 12:59 PM

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where did he mention pirating anything?

iron dome Aug 10, 2025, 12:59 PM

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Did you read what I actually said?

dusky compass Aug 10, 2025, 12:59 PM

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did you?

iron dome Aug 10, 2025, 12:59 PM

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Yes.

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Literally the first thing I said, "it's not exactly piracy".

dusky compass Aug 10, 2025, 1:00 PM

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then why say it
reading comprehension

iron dome Aug 10, 2025, 1:01 PM

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Not sure it's me that lacks the reading comprehension here.

dusky compass Aug 10, 2025, 1:02 PM

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"I'm not saying what are you doing is illegal, but if it was... heheh kid, ur in big trouble"

heady sparrow Aug 10, 2025, 11:08 PM

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Generally asset ripping stuff is not what we help with here in my experience... I think if they were just doing this to learn how the assets are serialized it would make sense but they explicitly say "datamining"

iron dome Aug 10, 2025, 11:13 PM

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Cos he'll definitely be data mining the example projects. 👍

twin grail Aug 10, 2025, 11:50 PM

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I didn't realize this topic fell under rule 5. I apologize

iron dome Aug 11, 2025, 10:20 AM

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It may not. I was just being overly cautious. If you're worried about it, you can always ask a mod. 🙂

twin grail Aug 12, 2025, 12:41 AM

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iron dome Pretty sure that'd be against the rules here.

<@&213101288538374145> maybe someone can clarify? And if it's not allowed please delete my original message

rain lake Aug 12, 2025, 12:42 AM

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I think it's fine? so long as the point isn't for hacking fortnite or whatnot

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the source of the format is available to you

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the point is to shut down piracy, data mining, and other exploitative behaviors; not to squelch knowledge or understanding of the underlying engine

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so as long as you aren't doing those things, you're fine

twin grail Aug 12, 2025, 12:45 AM

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In my case it will be for building a database of items available in a game, to be able to better plan how you play it. But I could see this kind of information being used by others for other potentially nefarious purposes

twin grail Aug 12, 2025, 1:39 AM

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dusky compass you literally have the source

You're not wrong. But the logic for reading/writing these files looks to be spread out to many places throughout the source code, and is further obscured by many levels of inheritance, overloading, and preprocessor macros. I've located some portions of it already in PackageFileSummary and ObjectResource, but feel like I'm still missing the big picture since I haven't really found the entry point for making these files

frigid basin Aug 12, 2025, 2:24 AM

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while this server isn't a modding server there's a case for it to be used for modding as well, which i don't think we would frown upon

wary bison Aug 12, 2025, 5:45 PM

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im looking to download ue 5.5.4 would this be the 5.5 in the github?

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or would it be dev-5.5?

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honestly don't know the difference

smoky goblet Aug 12, 2025, 6:02 PM

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wary bison im looking to download ue 5.5.4 would this be the 5.5 in the github?

At this point they should both be 5.5.4, but you want the 5.5 branch
The dev branch for the changes that will make the next version.
5.6.1 just dropped, so dev-5.6 is where the changes for 5.6.2 will be rolled out. When 5.6.2 is released, those changes will be merged into 5.6.

wary bison Aug 12, 2025, 6:06 PM

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smoky goblet At this point they should both be 5.5.4, but you want the 5.5 branch The dev bra...

ahhh interesting, nice ty that's good to know

dusky compass Aug 12, 2025, 6:28 PM

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wary bison im looking to download ue 5.5.4 would this be the 5.5 in the github?

there is a tag 5.5.4

wary bison Aug 13, 2025, 1:51 AM

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everything seems fine in the project but i have noticed on build, it will show these messages that i've never seen.. curious what they mean?

[Adaptive Build] Excluded from "plugin" ... etc

heady sparrow Aug 13, 2025, 2:55 AM

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excluded from unity build I believe

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which it should say right on the line you removed

wary bison Aug 13, 2025, 4:33 AM

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heady sparrow which it should say right on the line you removed

yea after the plugin or something before that, but what does it mean? did i do something wrong in this case is really what im asking, i used github to clone this time

heady sparrow Aug 13, 2025, 4:34 AM

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I believe it just can't unity blob some distinct files due to various build settings

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you can just read the code

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"Receives the files to compile using the adaptive unity configuration"

wary bison Aug 13, 2025, 4:35 AM

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heady sparrow you can just read the code

yea lol i mean it's kind of saying nothing other than what it says to me, like i dont know what it means. it's also every plugin that i have in the project that's what it's pointing to

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0>[Adaptive Build] Excluded from EIKShared unity file: EOSSDKManager.cpp, EOSShared.cpp, EIKSharedModule.cpp, PerModuleInline.gen.cpp

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example

heady sparrow Aug 13, 2025, 4:36 AM

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"// When adaptive unity is enabled, go ahead and exclude any source files that we're actively working with"

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the idea I think is to separate them so that changes to them are faster to compile instead of blobbing in random shit

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you will see adaptive unity kick in a lot when you live code X file

wary bison Aug 13, 2025, 4:40 AM

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so it's all good , and i should ignore basically . it shows when building the project from source on new engine version

heady sparrow Aug 13, 2025, 8:25 AM

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yeah afaik it's innocuous... not entirely sure how it chooses working directories but it being your plugins makes sense

timber sluice Aug 13, 2025, 3:56 PM

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I'm trying to build unreal source 5.5 on macOS sequoia with xcode 15.4, but warning as errors flag seems enabled, any idea how to avoid that?

Capture_decran_2025-08-13_a_17.49.25.png

astral elm Aug 13, 2025, 5:54 PM

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timber sluice I'm trying to build unreal source 5.5 on macOS sequoia with xcode 15.4, but warn...

I don't recall seeing this. You are on recommended spec?

Recommended macOS and Xcode Versions
macOS 14.7 Sonoma
Xcode 15.4```
[edit] corrected for 5.5

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I'm afraid Sequoia / Xcode version might cause issues, but... hard to say for certain. I do know people have had issues with not being on the precise spec in the past

timber sluice Aug 13, 2025, 6:00 PM

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yea I'm running on the latest Sequoia, but I guess you are right I'm might be to up to update

astral elm Aug 13, 2025, 6:02 PM

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timber sluice yea I'm running on the latest Sequoia, but I guess you are right I'm might be to...

I've personally been super paranoid about it after getting burned once some years back

wary bison Aug 13, 2025, 9:01 PM

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timber sluice I'm trying to build unreal source 5.5 on macOS sequoia with xcode 15.4, but warn...

i just built on 5.5 and 5.6 on mac and was successful with both im on 14.5 and xcode 16.2, if that helps

timber sluice Aug 14, 2025, 8:07 AM

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I'm using 15.6 and xcode 16.4, so maybe too up-to-date :/

timber sluice Aug 14, 2025, 12:41 PM

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I finally make it work using xcode 16.2

arctic girder Aug 23, 2025, 1:58 AM

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I'm trying to make an installed build of the 5.6.1 source on Windows. It works without the server target but if I add -set:WithServer=true, I get error C4702: unreachable code in the PixelStreaming2 plugin. Is this a known/common error? As I don't need it, can I just disable the plugin somewhere?

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Just found #engine-source message, but where do I add this line?

arctic girder Aug 23, 2025, 6:41 AM

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Ah, also found the issue and solution here: https://forums.unrealengine.com/t/c4702-error-occurs-when-creating-an-installed-engine-build-in-ue-5-6/2602486/3

Epic Developer Community Forums

C4702 error occurs when creating an installed engine build in UE 5.6

Hey there, This is a known issue that has been raised internally. I will post the public tracker link when it updates. Edit: Public tracking available here. Kind regards, Julian

lament wasp Aug 25, 2025, 9:26 PM

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anyone maintaining or know of a fork with nvrtx branch on top of ue5-main?

white river Aug 26, 2025, 8:04 AM

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Anyone has any experience with making an InstalledBuild? Which folder do I distribute, the DDC or the Engine one?

dusky compass Aug 26, 2025, 8:10 AM

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wellm what do you want to distribute, what for do you even make installedbuild

white river Aug 26, 2025, 8:11 AM

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dusky compass wellm what do you want to distribute, what for do you even make installedbuild

idea is for programmers (at least those who need engine source) to build themselves from source and let the rest of the team download the installed build and use that

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so whenever we update engine, either from Epic or some change from us, we run a job to make a new installed build and distribute that

dusky compass Aug 26, 2025, 8:13 AM

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so the distribute the intalled output folder

white river Aug 26, 2025, 8:14 AM

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In LocalBuilds there is an engine folder and a InstalledDDC folder

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so both?

dusky compass Aug 26, 2025, 8:16 AM

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did theychange outpout? I dont remember, prety sure there should be more than Engine\

dusky compass Aug 26, 2025, 9:28 AM

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or may be not, dont recall if it copies templates and starter content
Actually, yeah, Engine is allyou need since your content is already in your project. just copy ddc cache to the respectitive place

wary bison Aug 26, 2025, 11:56 AM

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anyone else on 5.6.1 getting this error? project still builds/opens, but not sure what this means

hidden hedge Aug 26, 2025, 12:02 PM

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wary bison anyone else on 5.6.1 getting this error? project still builds/opens, but not su...

unless you want to get into the business of upgrading nuget packages, I'd just ignore it. it's one of the .NET tools that brings it in. I think you only see this when using sln, which I'm not sure why you would be in Rider

wary bison Aug 26, 2025, 12:06 PM

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hidden hedge unless you want to get into the business of upgrading nuget packages, I'd just i...

Sounds simple enough. I’m in rider cause I’m on a Mac and I try to avoid Xcode

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Or are you saying why would I be using sln in rider?

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Not fully sure what sln is but I’d guts that means solution

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Guess **

hidden hedge Aug 26, 2025, 12:08 PM

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well you're on Mac so you're not dealing with sln files

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I hadn't actually seen this show up when using uproject

wary bison Aug 26, 2025, 12:11 PM

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hidden hedge I hadn't actually seen this show up when using uproject

My project builds and opens fine but I should also point out that in rider, all the files of my project show up red like there when is an issue with rider not recognizing the project. But there doesn’t seem to actually be an issue, but additional info

dusky compass Aug 26, 2025, 1:14 PM

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just ignore unless you have a very big team and there is a potential security risk wuth public facing stuff

lament wasp Aug 26, 2025, 10:58 PM

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wary bison anyone else on 5.6.1 getting this error? project still builds/opens, but not su...

it's super simple to update that. rider -> tools -> nuget -> tool window -> search magic -> right click -> upgrade

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likewise for the bouncycastle warning

white river Aug 27, 2025, 6:25 AM

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Has anyone had any luck configuring the logging of engine code? I've tried using -LogCmds, e.g.

C:\work\UESource\Engine\Binaries\Win64\UnrealEditor.exe C:\project\project.uproject -LogCmds="LogModuleManager Verbose"
But I don't see any difference in the log file. I even tried reducing the logs that I did get but no change at all.
I've also tried changing the .ini files as described https://dev.epicgames.com/community/snippets/3GoB/unreal-engine-how-to-set-log-verbosity-via-command-line-with-logcmds

Any ideas?

olive bobcat Aug 27, 2025, 7:42 AM

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Hi guys! I'm not sure if this is a proper channel for this question, but I can't find a more proper one in my opinion.

We are working in a team and use Unreal Engine compiled from source (everyone did it on their own machine). What is the right solution for the difference in GUID across the team? I found a solution that everyone should add another REG_SZ to the Windows Registry with some custom key name e.g. UE_5_6_Source. But I'm not sure if this is the correct solution. Any suggestions? Thanks in advance for answers.

white river Aug 27, 2025, 7:46 AM

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olive bobcat Hi guys! I'm not sure if this is a proper channel for this question, but I can't...

yes, after building they should run some script (to make it easier for everyone) that sets the same registry key for everyone

olive bobcat Aug 27, 2025, 7:47 AM

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white river yes, after building they should run some script (to make it easier for everyone)...

Thanks. 🙂

hidden hedge Aug 27, 2025, 8:38 AM

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olive bobcat Hi guys! I'm not sure if this is a proper channel for this question, but I can't...

If you set it up as a native project, you don't have to deal with regkeys or engine GUIDs

olive bobcat Aug 27, 2025, 8:50 AM

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hidden hedge If you set it up as a native project, you don't have to deal with regkeys or eng...

Can you expand what you mean by setting up as a native project?

hidden hedge Aug 27, 2025, 8:53 AM

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olive bobcat Can you expand what you mean by setting up as a native project?

Top pin in #source-control

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It's pretty much a complete guide to setting up an Unreal studio, but it covers how your engine source should be setup

dusky compass Aug 27, 2025, 9:46 AM

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white river Has anyone had any luck configuring the logging of engine code? I've tried using...

use engine.ini config and this is a general ue question, not related to source

hidden hedge Aug 27, 2025, 9:47 AM

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-logcmds is correct though for changing verbosity on the commandline, but there actually has to be a thing logging on that log channel at that verbosity to make a difference

visual marsh Aug 27, 2025, 8:54 PM

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Would it be a waste of money buying 128 gb of ram for engine builds & building indirect lighting?

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Currently leaning on settling for 2x48gb (and then maybe I can upgrade with another identical pair of 2x48 if its not enough)

iron dome Aug 28, 2025, 7:17 AM

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Depends how many cpu cores you have.

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You want 1.5gb per core plus 10-20.

viral sky Aug 28, 2025, 2:20 PM

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visual marsh Would it be a waste of money buying 128 gb of ram for engine builds & building i...

let me try and answer this a different way: You don't need 128 GB of ram to make engine builds.

gusty lance Aug 28, 2025, 5:51 PM

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Hey everyone, I'm wondering how to show the engine depot/branch on the title badge like I've seem on other games

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Just fyi, I've the source build + perforce already

hidden hedge Aug 28, 2025, 5:53 PM

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UGS and BuildGraph does this automatically through a SetVersion UAT job

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https://github.com/EpicGames/UnrealEngine/blob/6978b63c8951e57d97048d8424a0bebd637dde1d/Engine/Source/Programs/AutomationTool/BuildGraph/Tasks/SetVersionTask.cs#L14 if you need to reverse engineer how that works

gusty lance Aug 28, 2025, 6:18 PM

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Got it, it needs the UGS as well, thanks

smoky goblet Aug 28, 2025, 6:18 PM

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You should be able to update the build.version file manually. That's basically what the UAT job does

hidden hedge Aug 28, 2025, 6:19 PM

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UGS does it automatically as a step. For your actual build machines, you'll need to make it run that UAT job or mimick what it does (Build.version)

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the buildgraph templates also have it being setup there as well

gusty lance Aug 28, 2025, 6:20 PM

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smoky goblet You should be able to update the build.version file manually. That's basically w...

So, I tried to change the Build.version but didn't work either

hidden hedge Aug 28, 2025, 6:23 PM

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in which location because fundamentally, that's all it does

gusty lance Aug 28, 2025, 6:23 PM

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UnrealEngine/Engine/Build

hidden hedge Aug 28, 2025, 6:23 PM

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is this some weird setup with a foreign build or an installed build?

gusty lance Aug 28, 2025, 6:24 PM

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it's the normal git clone from the github repository

hidden hedge Aug 28, 2025, 6:24 PM

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yeah but is it a native build (correct) or a foreign build (technically correct, but kinda wrong)

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additionally, how are you trying to read the version information?

gusty lance Aug 28, 2025, 6:25 PM

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it's native

hidden hedge Aug 28, 2025, 6:26 PM

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are you forcibly enabling a unique build environment in <project>Editor.Target.cs?

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ie. do you run UnrealEditor.exe

gusty lance Aug 28, 2025, 6:27 PM

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hidden hedge ie. do you run UnrealEditor.exe

Yes, I've run through the UnrealEditor.exe and then created a project

gusty lance Aug 28, 2025, 6:28 PM

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hidden hedge are you forcibly enabling a unique build environment in <project>Editor.Target.c...

No

hidden hedge Aug 28, 2025, 6:29 PM

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so, how do you attempt to read the CL/branch info then?

gusty lance Aug 28, 2025, 6:34 PM

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Ok, I think I'm piecing it together. Just so I can confirm my understanding:
Is the expected workflow to modify the engine's C++ source to read the BranchName from Build.version and display it in the title bar? Or is there a built-in, automatic way to make it appear that I'm overlooking?

smoky goblet Aug 28, 2025, 6:37 PM

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You shouldn't need any C++ source changes. The title bar should show what's in the build.version file already.
This is what ours looks like for reference

{
  "MajorVersion": 5,
  "MinorVersion": 5,
  "PatchVersion": 0,
  "Changelist": 11866,
  "CompatibleChangelist": 11866,
  "IsLicenseeVersion": 1,
  "IsPromotedBuild": 0,
  "BranchName": "++Burbank+Mid+Game.Dev"
}

(though it's set through UGS, but at home I edit it manually and it works fine)

gusty lance Aug 28, 2025, 6:47 PM

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smoky goblet You shouldn't need any C++ source changes. The title bar should show what's in t...

Yeah, mine is like this as well... strange

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I'll get a revision on everything, maybe there's something missing

hidden hedge Aug 28, 2025, 6:53 PM

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gusty lance Ok, I think I'm piecing it together. Just so I can confirm my understanding: Is ...

I'm mostly just asking what API you use to read the version information

gusty lance Aug 28, 2025, 6:57 PM

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To be perfectly honest, I'm very new to engine versioning processes and I'm not sure I fully understand the question. When you ask "what API I use to read the information", I'm not entirely clear on what that means.
My understanding so far is that I just need to edit the Build.version file, and the engine will then automatically read it and display the branch.
Is the C++ function FEngineVersion::Current().GetBranchDescriptor() the "API" that does this job behind the scenes? Sorry if this is a basic question, I'm just trying to learn the correct process.

hidden hedge Aug 28, 2025, 7:04 PM

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that one is compile time, so when you modify Build.version you compile

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https://github.com/EpicGames/UnrealEngine/blob/6978b63c8951e57d97048d8424a0bebd637dde1d/Engine/Source/Runtime/BuildSettings/BuildSettings.Build.cs#L33 this populates the define

gusty lance Aug 28, 2025, 7:14 PM

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Got it, I'll try and see if works

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Thanks

gusty lance Aug 29, 2025, 7:01 PM

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So, just for update, no luck at all, I'm using the UGS and have everything ready to go

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Anyway, thanks for the help

round pagoda Aug 30, 2025, 10:43 AM

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Any news on a 5.6.2? Its been ages since 5.6.1, and no patch version update in the Version.h file in the dev branch. I assume that means next will be 5.7?

https://github.com/EpicGames/UnrealEngine/blob/dev-5.6/Engine/Source/Runtime/Launch/Resources/Version.h

iron dome Aug 30, 2025, 1:01 PM

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Seems so.

vital hawk Aug 30, 2025, 4:37 PM

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Unreal Fest Stockholm (sep 22-24) has 5.7 talks, so I'm guessing the preview will drop around that time

last mango Sep 2, 2025, 4:57 AM

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Hey, I have a question about Wwise X Movie Render Queue. When using Wwise, there's no way to use the Movie Render Queue to render out audio. I'm looking at getting this fixed for my project. I wanted to validate what are the correct steps. My initial research points towards having to write a custom audio device for non-realtime rendering, but that's considerable effort. The UE source code is also quite convoluted when it comes to creating audio device for non-realtime rendering. Looks like it's hardcoded to using the Audio::FMixerPlatformNonRealtime. Which suggests I might need to modify the engine to make the Movie Render Queue work correctly with Wwise.
Is someone here versed in this part of the engine or could point me to a contact who could help me understand the correct process before I commit to the work?

white river Sep 2, 2025, 9:07 AM

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About the native project setup, are people doing that outside of perforce too? As some kind of monorepo which includes engine as well as the projects?

hidden hedge Sep 2, 2025, 9:16 AM

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I did want to do this at a previous studio because doing anything with the engine when using an installed build is just annoyingly loathesome. If you had to do any engine work, you essentially had to checkout the engine repo and then checkout the project within it, for your own local jank native build. I guess that worked for the most part but the studio's workflows completely discouraged pushing anything to the engine repo

white river Sep 2, 2025, 9:39 AM

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hidden hedge I did want to do this at a previous studio because doing anything with the engin...

Yeah, its messy... But does it really have to be a native project?

hidden hedge Sep 2, 2025, 9:40 AM

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it doesn't have to be, but generally it's way more convenient to be able to make modifications to the engine without it being a whole process

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but git (if this is what "outside of perforce" means) was just incredibly annoying to use for game dev

white river Sep 2, 2025, 9:49 AM

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in my current and past jobs we use Plastic (Unity Version Control) and of course git for accessing the engine github

#

it feels like a waste because we have to reinvent UGS

hidden hedge Sep 2, 2025, 9:52 AM

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yeah the git studio had a bunch of tooling to deliver PCBs and it was all using git hooks and command line utilities

white river Sep 2, 2025, 9:53 AM

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i did get a workflow with installed build working so then there's one workflow for engine devs and one for the rest 🎉
but now im also trying one where the "rest" download the engine source from Plastic (like a "copy" of the github fork) and then download PCBs separetaly. I dont know if that will work but it sounds like it might be tiny bit smoother than using installed build

hidden hedge Sep 2, 2025, 9:55 AM

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it's been a long while since I used plastic, but it always seemed like a worst of both worlds solution

white river Sep 2, 2025, 9:56 AM

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for gamedev stuff i do prefer plastic over git

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never worked with perforce

cobalt ether Sep 2, 2025, 3:53 PM

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I made a binary build for UE5.6.1 without any issues but when trying to make one for UE5.5.4 I get this error

Does anyone know how to fix it?

cobalt ether Sep 2, 2025, 4:22 PM

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Figured it out, for others having the same issue:
Whatever "SwarmCoordinator" is, it's targeting .NET 4.6.2

So basically, following the UE documentation for making an installed build won't solve this issue.
There you get told to install .NET6.0, but you also need to install .NET4.6.2 (Which is never mentioned)

After installing, I managed to build without problems :)

warm matrix Sep 4, 2025, 4:38 PM

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Hi! My game crashes after a seemingly random amount of time when its built, whereas in the editor it seems to be fine and doesn't crash at all. This is the only error I get; [2025.09.04-16.34.46:201][305]LogWindows: Error: appError called: Assertion failed: SharedThis.Get() == this [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Templates\SharedPointer.h] [Line: 1591]

#

Any ideas?

hidden hedge Sep 4, 2025, 4:45 PM

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there will usually be a callstack

glacial hinge Sep 4, 2025, 4:47 PM

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warm matrix Hi! My game crashes after a seemingly random amount of time when its built, wher...

impossible to say from this
seems like some pointers issue, maybe you assign some pointer created with new that became nullptr(maybe garbage collected) to a shared ptr or somethign like this?

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a call stack should be helpful for sure

haughty warren Sep 4, 2025, 5:29 PM

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I added a typo to Vector.h and tried to compile, it screamed at me ofc. I fixed the typo and now Unreal wants to recompile the entire engine................
Any way I can skip this?

iron dome Sep 4, 2025, 6:53 PM

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No

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Make the engine files read only and your ide will ask you if you want to overwrite.

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Saves a lot of time.

thick furnace Sep 5, 2025, 11:31 AM

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warm matrix Hi! My game crashes after a seemingly random amount of time when its built, wher...

without call stack hard to say, but i'd expect it is access to AsShared() of TSharedFromThis within c++ constructor, the previous call stack frame should tell you exactly where it was. also it could be caused by using AddSP binding delegate
if you look at the line


        // If the following assert goes off, it means one of the following:
        //
        //     - You tried to request a shared reference before the object was ever assigned to one. (e.g. constructor)
        //     - You tried to request a shared reference while the object is being destroyed (destructor chain)
        //
        // To fix this, make sure you create at least one shared reference to your object instance before requested,
        // and also avoid calling this function from your object's destructor.
        //
        check( SharedThis.Get() == this );

abstract cloud Sep 10, 2025, 1:01 PM

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Hello, does anyone know how to fix this error when trying to build a project from visual studio? I have someone trying to build the project but this same error message comes up for this, and "theempiresoftherift.dll",

LINK : fatal error LNK1181: cannot open input file 'wininet.lib'
 Link [x64] UnrealEditor-VisualStudioBlueprintDebuggerHelper.dll: Exited with error code 1181 . The build will fail.```

hidden hedge Sep 10, 2025, 1:50 PM

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abstract cloud Hello, does anyone know how to fix this error when trying to build a project fro...

You shouldn't really need the VS tools plugin but the error itself sounds like you either didn't install the Windows SDK or installed an unsupported version

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This doesn't sound like it's engine source, might be more appropriate in #cpp

abstract cloud Sep 10, 2025, 1:54 PM

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yeah I sent it in that channel because I thought the same, also we did install some unsupported version in the individual components tab to try to solve it

inland spruce Sep 11, 2025, 4:25 AM

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Attempting to build UE5.3 branch from source. Using VS 2022. After a VS update, I've been unable to build it.

Getting some compilier errors saying.
"overflow in constant arithmetic"

Its whenever the INFINITY macro is being used in the unreal source.

EX:

static float GetClobberValue()
{
    switch (GRDGClobberResources)
    {
    case 1:
        return 1000.0f;
    case 2:
        return NAN;
    case 3:
        return INFINITY;
    }
    return 0.0f;
}

Does anyone know how to solve this?

iron dome Sep 11, 2025, 6:30 AM

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Change infinity to a large number.

hidden hedge Sep 11, 2025, 9:30 AM

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5.3 is a bit old now, are you also on the right MSVC toolchain for it?

compact rain Sep 11, 2025, 5:18 PM

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FLT_MAX is likely what you need

merry sun Sep 11, 2025, 9:03 PM

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Hi, in UE 5.x we have EditorscriptableClickDragTool (Scriptable Tools Framework plugin), where I could find the implementation in the sourcecode? I just found the .h file https://github.com/EpicGames/UnrealEngine/blob/5.7/Engine/Plugins/Runtime/ScriptableToolsFramework/Source/EditorScriptableToolsFramework/Public/BaseTools/EditorScriptableClickDragTool.h

hidden hedge Sep 11, 2025, 10:55 PM

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merry sun Hi, in UE 5.x we have EditorscriptableClickDragTool (`Scriptable Tools Framework...

this class literally does nothing. all the behaviour is inherited from UScriptableClickDragTool (which isn't Blueprintable)

merry sun Sep 12, 2025, 12:09 AM

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this class literally does nothing. all

delicate latch Sep 13, 2025, 12:05 AM

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Anyone know offhand-ish where the build system (for OSX) kicks off ld command during compilation? Seems like on my OSX laptop a pristine third-personal example project won't build. Doing hobbyist UE5 stuff and am not eager to jump into the build toolchain.

Error detail [here](#cpp message). Basically just want to know what args ld is being invoked with to see why it's pissed

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or is there some config to have more verbosity?

hidden hedge Sep 16, 2025, 9:49 AM

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delicate latch Anyone know offhand-ish where the build system (for OSX) kicks off `ld` command ...

Not sure if this is an appropriate channel but did you share your Build.cs and Target.cs anywhere?

#

Also I'm 3 days late to this

delicate latch Sep 16, 2025, 5:36 PM

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hidden hedge Not sure if this is an appropriate channel but did you share your Build.cs and T...

Just whatever comes out of the box for new 5.6 project

hidden hedge Sep 16, 2025, 5:50 PM

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delicate latch Just whatever comes out of the box for new 5.6 project

this is pseudocode but you probably can do something like:

if (Target.Platform == UnrealTargetPlatform.Mac)
{
    AdditionalLinkerArguments = "-v";
}

inside <project>Editor.Target.cs

delicate latch Sep 16, 2025, 10:12 PM

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hidden hedge this is pseudocode but you probably can do something like: ```cs if (Target.Plat...

Sick thank you I'll dig around

gaunt heart Sep 17, 2025, 9:08 AM

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I'm making a modified view of a UAsset that uses gameplay tags, and I wanted it to expand all on open but it turns out the only method for it is private, is there anything else I can do? Idk how to make feature requests either (nor have the ability to wait until then)

heady sparrow Sep 17, 2025, 9:20 AM

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gaunt heart I'm making a modified view of a UAsset that uses gameplay tags, and I wanted it ...

you can always just UE_DEFINE_PRIVATE_MEMBER_PTR on newer versions

#

or use the access private header-only lib

#

you are in luck that it appears this is exported

gaunt heart Sep 17, 2025, 9:21 AM

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yeah I'm on 5.6.1

gaunt heart Sep 17, 2025, 9:29 AM

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heady sparrow you can always just UE_DEFINE_PRIVATE_MEMBER_PTR on newer versions

no more intellisense complaints but it does this, I tried changing names of the macro but then it cant find the private method or idk how to call it

heady sparrow Sep 17, 2025, 9:34 AM

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gaunt heart no more intellisense complaints but it does this, I tried changing names of the ...

read the comment in the source closely

#

I don't think you want to make the ptr it makes for acces the same name as the type?

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also error list isn't very useful here, we mainly care about the output log for c++ compilation

gaunt heart Sep 17, 2025, 9:36 AM

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I think i got it

#

compiling

gaunt heart Sep 17, 2025, 9:57 AM

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(Picker.Get().*SGameplayTagPickerSetTagTreeItemExpansion)(true, true); got it with this and had to do void (bool, bool) in the macro

novel minnow Sep 21, 2025, 4:35 PM

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ive built my engine from source, but my other machines cant run the project as they say the game project was built with a different version of unreal. my engine source is 560gb...i dont have enough disk space in the other machines for this. what's the solution?

smoky goblet Sep 21, 2025, 4:52 PM

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novel minnow ive built my engine from source, but my other machines cant run the project as t...

Why is it so big? Mine's only 250. That's with binaries/pdb for three configurations.
But really the only option is a full binary deliverable, but that build can really only edit blueprints.

novel minnow Sep 21, 2025, 4:55 PM

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smoky goblet Why is it so big? Mine's only 250. That's with binaries/pdb for three configurat...

i have sdks from consoles
might be why so big?

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i dont wanna do any c++ on the other machines.(blueprinting is fine) how can i create a binary deliverable?

smoky goblet Sep 21, 2025, 5:01 PM

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Maybe that explains it. You can go the route of manually checking in your binaries. That's usually discouraged but it can work for a one programmer team. Using Horde & UGS or some other CI solution to build and package up binaries that other team members can sync to is what larger teams do.

novel minnow Sep 21, 2025, 6:36 PM

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smoky goblet Maybe that explains it. You can go the route of manually checking in your binari...

"pseudo-programmer" 😅

dusky compass Sep 21, 2025, 8:00 PM

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novel minnow ive built my engine from source, but my other machines cant run the project as t...

open uproject file and make version empty

bright linden Sep 23, 2025, 5:30 AM

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When we build Unreal Engine, it says build UE5. But how do you deal with it when you accidentally press Build Solution in the toolbar above? Do you delete binary or something folder?

hidden hedge Sep 23, 2025, 9:55 AM

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?

iron dome Sep 23, 2025, 4:07 PM

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If you accidentally hit build solution, you can just cancel it. Then go back to building UE5.

heady sparrow Sep 24, 2025, 1:38 AM

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I think they are trying to save on space from the extra binaries and pdbs created

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I would say if you can deal with it it's not a bad idea to clear out binaries/intermediate and do a regular build

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if you can leave it on for a bit

iron dome Sep 24, 2025, 11:17 AM

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I guess!

candid canopy Sep 24, 2025, 2:41 PM

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Heya guys, I just downloaded the 5.6.1 source and am having issues. I've already ran setup/generateprojectfiles.

Now I dropped the UE5.sln into rider but get a bunch of Microsoft.NET.SDK.WorkloadAutoImportPropsLocator errors. Am I doing something wrong?

#

(I've built from source before but feel like im missing a step somewhere)

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I know you don't normally use the sln with rider, but there's no uproject file here to build from

dusky compass Sep 24, 2025, 3:10 PM

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try building from command line directly

candid canopy Sep 24, 2025, 3:12 PM

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I'm not sure how to do that. Trying with VS2022 atm

candid canopy Sep 24, 2025, 3:31 PM

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Edit : VS was the fix, I guess rider can't just build from the sln (out of the box)

astral elm Sep 24, 2025, 4:44 PM

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candid canopy Edit : VS was the fix, I guess rider can't just build from the sln (out of the b...

I build source engine with Rider, don't recall having to do any magic tricks for it

quasi laurel Sep 25, 2025, 2:59 PM

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candid canopy Edit : VS was the fix, I guess rider can't just build from the sln (out of the b...

Nope, you need the VS Toolchain (MVSC)

Rider just is the better code editor.. but has no own toolchain included..

#

Hope that will come in the future..

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But you can also install the toolchain without VS by using msys

astral elm Sep 25, 2025, 3:36 PM

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ah true true

candid canopy Sep 25, 2025, 4:32 PM

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oh right that makes sense

vagrant herald Sep 27, 2025, 9:35 PM

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Hi. Does anyone know how to build Unreal Engine 4.27 with Visual Studio 2022?

#

or current Visual Studio Code? I don't have a Microsoft Subscription to get VS2019...

astral elm Sep 29, 2025, 9:10 AM

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vagrant herald or current Visual Studio Code? I don't have a Microsoft Subscription to get VS20...

Thats bad news for oldskool devs! When did they change that...

hidden hedge Sep 29, 2025, 10:18 AM

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MS would probably tell you to you can download old MSVC toolchains for VS2022

dusky compass Sep 29, 2025, 1:38 PM

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what the issue it compiels just fine

heady sparrow Sep 30, 2025, 1:59 AM

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To be clear your IDE can use a different version of MSVC build tools and probably still stay on 2022 (not that what sswires said leaves anything out, just to be specific)

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us the VS installer and switch to individual components then find the versions you want

white river Oct 1, 2025, 6:32 AM

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Hii, I was wondering, does anyone else experience that visual studio rebuilds everything all the time when working in a project from source? This can't be right, I just press Build -> Build Solution

white river Oct 1, 2025, 6:54 AM

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My UnrealBuildTool log says that "Engine\Intermediate\Build\Win64\x64\UnrealEditor\Development\Core\SharedDefinitions.Core.Cpp20.h: contents have changed." but I didn't do any thing 🤔

heady sparrow Oct 1, 2025, 9:13 AM

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white river Hii, I was wondering, does anyone else experience that visual studio rebuilds ev...

does it also do this if you run from your game project?

white river Oct 1, 2025, 9:14 AM

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heady sparrow does it also do this if you run from your game project?

yes. it actually stopped now after a couple of builds

heady sparrow Oct 1, 2025, 9:14 AM

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you should build/run your project, not the entire solution imo (when compiling both)

#

I may misunderstand the exact distinction here as it relates to vs but you want to only build what your game actually uses and not the entire engine

white river Oct 1, 2025, 9:25 AM

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heady sparrow I may misunderstand the exact distinction here as it relates to vs but you want ...

yeah makes sense but what i do is

generate project files with the uproject
open up the solution
press Build -> Build solution

iron dome Oct 1, 2025, 9:41 AM

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There are build.cs settings that can cause recompilation.

#

Make sure all the settings that are there are set to latest if they are specifically set to something else.

white river Oct 1, 2025, 9:50 AM

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iron dome There are build.cs settings that can cause recompilation.

like which?

iron dome Oct 1, 2025, 10:00 AM

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Which do you have in your build.cs?

hidden hedge Oct 1, 2025, 10:39 AM

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white river yeah makes sense but what i do is * generate project files with the uproject * o...

if you are already using a native project, I'm not sure why you'd EVER hit "build solution"

#

build your project target only

#

and it wouldn't be Build.cs anyway, it would be Target.cs

#

Build.cs is only per-module

white river Oct 1, 2025, 10:42 AM

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hidden hedge build your project target only

how exactly? like right click on it in the solution explorer and press build?

hidden hedge Oct 1, 2025, 10:42 AM

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yes

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helps if it's the startup project

white river Oct 1, 2025, 10:53 AM

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Yeah it is

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I thought that when you pressed Build -> Build solution it only built the startup project?

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What should I have here?

hidden hedge Oct 1, 2025, 10:55 AM

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probably that, but for day-to-day gameplay programming "debuggame editor" is probably better

#

just under no circumstances build solution, only the game project itself

white river Oct 1, 2025, 10:55 AM

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currently its develoopment_editor

hidden hedge Oct 1, 2025, 10:55 AM

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this is why there are VS extensions to bulid the startup project

white river Oct 1, 2025, 10:56 AM

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alright, thanks, will try these suggestions later today

iron dome Oct 1, 2025, 1:22 PM

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https://marketplace.visualstudio.com/items?itemName=SenHarada.BuildOnlyStartupProject is the one I use.

dusky compass Oct 1, 2025, 3:03 PM

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white river My UnrealBuildTool log says that "Engine\Intermediate\Build\Win64\x64\UnrealEdit...

this is a generated header, in includes multiple others any changes to them or any relations can cause rebuild
even as simple thing as resaving any file with new timestamp, including aforementioned build.cs or even uproject can cause UHT and UBT to do new pass

hidden hedge Oct 1, 2025, 4:16 PM

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it's probably because of the stuff already discussed anyway

#

Target.cs, not Build.cs, is going to be changing definitions. Build.cs is for the module level

minor verge Oct 2, 2025, 2:04 PM

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Would anyone happen to have any knowledge of the bug in engine trace code mentioned in this commit? https://github.com/EpicGames/UnrealEngine/commit/da1a30a3f74782a7c3d6d998ae19ee87a0fad3d8
One thing to note - due to a bug in the engine Trace code, we need to use NoSync on the PollingEvent or the trace could end up with a missing Sync event and make the file unreadable from that point on.
Haven't had any luck on the issue tracker.

heady sparrow Oct 3, 2025, 1:24 AM

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minor verge Would anyone happen to have any knowledge of the bug in engine trace code mentio...

probably something to do with serializing the end resulting trace file if I had to guess

a lot of these changes to the internal polling trace for iris is probably because they can now do so in parallel

#

it's not super hard to make the object polling itself safe (they are all pretty isolated) but net tracing is something they all have to write which is scary to do in parallel as it was before

#

as for the actual trace structure itself I have no clue so that's not a great answer

#

but the iris part I am familiar with here

minor verge Oct 3, 2025, 4:24 AM

#

heady sparrow probably something to do with serializing the end resulting trace file if I had ...

For context, the NoSync marker doesn't seem to cause any issues with the parallel object polling.
However, about 2 months ago, for our project I modified the engine to execute the client tick phase in parallel (STAT_NetDriver_TickClientConnections).

I've had that running perfectly fine without any crashes or bugs for 2 months, but when running performance traces I'll often (25% - 50% of them) have trace files which freeze up the Insights UI when you try to load them.
They'll load eventually but will dump out a log file that's about 3GB in size, with just this log statement being spammed: "PacketContentEvent GameInstanceId: %u, ConnectionId: %u %s, Missing NameIndex: %llu".

My assumption for why this happens is that the Name event isn't guaranteed to be recorded before other events (or maybe at all?), due to the NoSync marker.
I'll be testing removing the marker next week when I get the chance, but I've got no information on this other supposed bug which the NoSync marker fixes.

lament wasp Oct 6, 2025, 7:43 PM

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has anyone fixed the bugs with UE_WITH_REMOTE_OBJECT_HANDLE so that it functions? ue devs said that they wont provide the internal code to get it to work, so we need to figure out how to make it work by separating it from internal code

dusky compass Oct 6, 2025, 8:11 PM

#

said where

lament wasp Oct 6, 2025, 8:34 PM

#

dusky compass said where

#1376683013915672698 message

#

@chrome fjord please correct me if i misunderstood something

dusky compass Oct 6, 2025, 8:52 PM

#

lament wasp Oct 6, 2025, 8:55 PM

#

dusky compass

sorry, https://discord.gg/7VFyu6rJ

#

ows is epic mega grant recipient

dusky compass Oct 6, 2025, 9:27 PM

#

and what do you need UE_WITH_REMOTE_OBJECT_HANDLE for?

lament wasp Oct 6, 2025, 10:41 PM

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dusky compass and what do you need `UE_WITH_REMOTE_OBJECT_HANDLE` for?

everything that pertains to the multiserver plugin, 88 files use if UE_WITH_REMOTE_OBJECT_HANDLE, and it is tightly coupled to all remote* classes

#

RemoteExecutor
RemoteObject
RemoteObjectPathName
RemoteObjectPrivate
RemoteObjectSerialization
RemoteObjectTransfer

chrome fjord Oct 6, 2025, 11:12 PM

#

lament wasp <@1082436525381398578> please correct me if i misunderstood something

I think that answer still holds true. I'll give you a quick update there. Edit: Actually this may be another month before I have something useful to say. Some code changed from an earlier implementation that gave a clearer path for licensee adoption of this feature. I'm bringing up the changes with the team to re-enable a better path for adopting this. Whoops. I'll let you know in a month!

lament wasp Oct 6, 2025, 11:14 PM

#

thank you sir !

torn cypress Oct 7, 2025, 9:45 AM

#

Hey
For those who put Engine source into git repository and put project files as "native" project, what is your process regarding gitignore files? Do you use the ue git repo gitignore + call Setup.bat on each PC?

heady sparrow Oct 8, 2025, 12:41 AM

#

torn cypress Hey For those who put Engine source into git repository and put project files as...

just use the built in unreal one which applies already?

torn cypress Oct 8, 2025, 7:29 AM

#

heady sparrow just use the built in unreal one which applies already?

Sure. I’m curios, because perforce engine source has no “setup”. Thinking about if it makes any sense to call setup on clean git engine repo and then commit all the files to git. That will require changing the gitignore (otherwise binaries, downloaded by setup.bat will be ignored)

heady sparrow Oct 8, 2025, 7:30 AM

#

torn cypress Sure. I’m curios, because perforce engine source has no “setup”. Thinking about ...

binaries in git does not seem like a great idea to distribute a build

torn cypress Oct 8, 2025, 7:32 AM

#

heady sparrow binaries in git does not seem like a great idea to distribute a build

Then it makes sense
Thanks

heady sparrow Oct 8, 2025, 7:34 AM

#

it might be okay if it was a distinct branch you don't touch I guess

#

might be easier to distribute a rocket build with a script or something

#

it's honestly kind of insane there is no simple "distribute biary to artists" setup that doesn't involve perforce

torn cypress Oct 8, 2025, 7:36 AM

#

heady sparrow it's honestly kind of insane there is no simple "distribute biary to artists" se...

Yeah, thats the case. Professionally perforce just works (Horde, UGS)
But for pet projects, when I need to keep some engines changes through engine versions, I am biasing towards committing engine source directly to my git

heady sparrow Oct 8, 2025, 7:36 AM

#

https://vilbeyli.github.io/How-to-Setup-a-Perforce-Workflow-Automate-Distribute-UE4-Builds/#build

heady sparrow Oct 8, 2025, 7:37 AM

#

torn cypress Yeah, thats the case. Professionally perforce just works (Horde, UGS) But for pe...

engine SOURCE is not the issue here, I don't recall saying the source was not ideal to commit

#

we are talking about BINARIES

#

having the custom engine alongside your project is generally the case

#

they are inseperable in a decently large project (with any signfiicant engine changes)

torn cypress Oct 8, 2025, 7:38 AM

#

Am I correct that setup.bat downloads platform specific binaries for some plugins/engine parts? Ive seen some platform excludes as arguments

heady sparrow Oct 8, 2025, 7:38 AM

#

yes, you can exclude platforms you don't care about

#

Setup.bat -include=Win64 I think is worth a shot

#

this could have changed names over the years

#

the full list is a bit insane

./Setup.bat -exclude=WinRT -exclude=Mac -exclude=MacOS -exclude=MacOSX -exclude=osx -exclude=osx64 -exclude=osx32 -exclude=Android -exclude=TVOS -exclude=Linux -exclude=Linux32 -exclude=Linux64 -exclude=linux_x64 -exclude=HTML5 -exclude=PS4 -exclude=XboxOne -exclude=Switch -exclude=Dingo -exclude=Win32 -exclude=GoogleVR -exclude=LeapMotion

torn cypress Oct 8, 2025, 7:41 AM

#

Hm. Well, maybe then committing engine source only and calling setup with args to exclude other platforms is not the worst scenario

torn cypress Oct 8, 2025, 7:43 AM

#

heady sparrow the full list is a bit insane ``` ./Setup.bat -exclude=WinRT -exclude=Mac -exclu...

Omg..

heady sparrow Oct 8, 2025, 7:44 AM

#

I think it might be missing a couple now too lol

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seems like what people do is kinda just copy the build results sans pdbs

torn cypress Oct 8, 2025, 7:47 AM

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heady sparrow seems like what people do is kinda just copy the build results sans pdbs

For the editor binaries I assume

heady sparrow Oct 8, 2025, 7:47 AM

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yeah, the pdbs are by far the most cumbersome part of the distributed files

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ideally they have them just to make better crash logs but you should be able to debug dumos by just using your own copy of the pdbs

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well, more like ideally something else maps the pdbs for you magically

torn cypress Oct 8, 2025, 7:48 AM

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Like pdb server

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I think ive seen some docs about that
Maybe only binaries to distribute

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im curious about the real setup in some studios for non p4/non UGS

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git lfs on binaries (pdb too) might work as well

heady sparrow Oct 8, 2025, 7:50 AM

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from what I can read they just run buildgraph and send the files to something that isn't git

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lfs here seems like needless complexity to me

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using git at all I guess

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maybe it could help bind the idea of the engine version to the artists work but they would probably prefer something not git anyways

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some people use svn I guess

torn cypress Oct 8, 2025, 7:52 AM

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That’s fair. I worked with all three p4, svn and git. Looked at diversion briefly.

heady sparrow Oct 8, 2025, 7:52 AM

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also artists just building the source is not intolerable imo

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unless you are cranking out core header changes daily

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all they need to do is click the uproject and use correct loading settings that force recompile

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https://forums.unrealengine.com/t/is-there-any-way-to-eliminate-the-visual-studio-dependency-for-artists-etc/92208/2

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so some people do just put the dev editor binaries in source control

torn cypress Oct 8, 2025, 7:55 AM

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heady sparrow <https://forums.unrealengine.com/t/is-there-any-way-to-eliminate-the-visual-stud...

Oh interesting
Will check

heady sparrow Oct 8, 2025, 7:55 AM

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this seems really wacky to me but if it works it works think

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if this breaks it will be ragnarok to fix though lol

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also only windows allowed it seems

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https://dev.epicgames.com/documentation/en-us/unreal-engine/create-an-installed-build-of-unreal-engine I would have voted to just have some script that automates doing this + pushing up to whatever and artists just can use the same engine association

torn cypress Oct 8, 2025, 8:17 AM

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heady sparrow <https://dev.epicgames.com/documentation/en-us/unreal-engine/create-an-installed...

Oh yes
That takes quite some time to build but if engine does not change often, that might work.

spring solstice Oct 10, 2025, 6:25 PM

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Guys I am having trouble compiling a precompiled build of the Unreal Engine.

ERROR: Source file 'D:\EngineDev\UE4_WedgieSim\Engine\Binaries\DotNET\AutomationUtils.Automation.dll' is not under 'D:\EngineDev\UE4_WedgieSim\Engine\Saved\CsTools'
       while executing task <Copy Files="#Build Tools CS Binaries" From="D:\EngineDev\UE4_WedgieSim/Engine/Saved/CsTools" To="D:\EngineDev\UE4_WedgieSim/LocalBuilds/Engine/Windows" Overwrite="True" Tag="#Installed Build Win64 Files" />
       at Engine\Build\InstalledEngineBuild.xml(948)
       (see D:\EngineDev\UE4_WedgieSim\Engine\Programs\AutomationTool\Saved\Logs\Log.txt for full exception trace)
AutomationTool exiting with ExitCode=1 (Error_Unknown)
BUILD FAILED```

 It seems the "AutomationUtils.Automation.dll" is not packaging properly at the last stage of the building process. I tried rebuilding the AutomationTool C# project, all other C# rebuild projects. Nothing is working to resolve this issue.

astral elm Oct 10, 2025, 9:20 PM

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spring solstice Guys I am having trouble compiling a precompiled build of the Unreal Engine. ``...

Is this... UE4 like mention in the log, 4.27? ( I have no immediate clue, but may help to specify what version you are on )

dusky compass Oct 10, 2025, 9:42 PM

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Remove source copying step from the build graph

spring solstice Oct 10, 2025, 10:46 PM

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astral elm Is this... UE4 like mention in the log, 4.27? ( I have no immediate clue, but ma...

Yeah, 4.27

spring solstice Oct 10, 2025, 10:46 PM

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dusky compass Remove source copying step from the build graph

Source copying step?

dusky compass Oct 11, 2025, 12:36 AM

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default buildgrap copies source files by default, you can remove it

spring solstice Oct 11, 2025, 1:43 AM

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dusky compass default buildgrap copies source files by default, you can remove it

spring solstice Oct 11, 2025, 4:38 AM

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dusky compass default buildgrap copies source files by default, you can remove it

It worked! I deleted that line and it finally compiled a new engine build. Thanks man!

paper prawn Oct 12, 2025, 5:32 PM

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While working on a project, Found this error in shipping & Dev build

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 1067] 
Array index out of bounds: 1 into an array of size 1


0x00007ff76f8e4048 BYOG.exe!FDebug::CheckVerifyFailedImpl2() []
0x00007ff7769bf96a BYOG.exe!FInstancedStaticMeshSceneProxy::GetDynamicRayTracingInstances() []
0x00007ff773992e3f BYOG.exe!RayTracing::FDynamicRayTracingInstancesContext::GatherDynamicRayTracingInstances_Internal() []
0x00007ff773992c50 BYOG.exe!RayTracing::FDynamicRayTracingInstancesContext::GatherDynamicRayTracingInstances() []
0x00007ff773961684 BYOG.exe!`FPixelShaderUtils::AddFullscreenPass<FVisualizeMotionVectorsPS>'::`2'::<lambda_1>::operator()() []
0x00007ff76f5e9fa3 BYOG.exe!UE::Tasks::Private::FTaskBase::TryExecuteTask() []
0x00007ff76f5ba00f BYOG.exe!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask * __ptr64 __cdecl(bool),48>::TTaskDelegateImpl<`LowLevelTasks::FTask::Init<`UE::Tasks::Private::FTaskBase::Init'::`2'::<lambda_1> >'::`13'::<lambda_1>,0>::CallAndMove() []
0x00007ff76f5c819e BYOG.exe!LowLevelTasks::FTask::ExecuteTask() []
0x00007ff76f5c7f4a BYOG.exe!LowLevelTasks::FScheduler::ExecuteTask() []
0x00007ff76f5eda91 BYOG.exe!LowLevelTasks::FScheduler::WorkerLoop() []
0x00007ff76f5b1a0a BYOG.exe!operator<<() []
0x00007ff76f7bfb53 BYOG.exe!FThreadImpl::Run() []
0x00007ff76fc1e408 BYOG.exe!FRunnableThreadWin::Run() []
0x00007ff76fc1709f BYOG.exe!FRunnableThreadWin::GuardedRun() []
0x00007ffbc2abe8d7 KERNEL32.DLL!UnknownFunction []

Crash in runnable thread Background Worker #7

It got fixed when i turned off ray tracing,
Just to clarify , there is no ISMs that are less than 1 or 0 meshes
mats r same for every one of them too
i feel like this is engine level issue,
unreal engine 5.6.1

drifting niche Oct 13, 2025, 2:33 AM

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everytime i build the source engine the unreal editor app file always disappears from the engine files. does this happen to anyone else?

round pagoda Oct 15, 2025, 8:18 AM

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Just came across the amazing talk by Keith Judge on Engine Upgrades. Says apparently you should re-save all of your project assets?

I have never done this and never noticed any warnings. Does using the source build of the engine save an engine version in the same way as precompiled? Is it necessary?

hidden hedge Oct 15, 2025, 9:59 AM

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round pagoda Just came across the amazing talk by Keith Judge on Engine Upgrades. Says appare...

yes it does if you use UGS or use the SetVersion UAT step. I've never done this either and not sure why it would be necessary

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maybe a marginal editor loading/cooking speedup if it's dealing with deprecated properties? but I can't imagine it's much else, and that wouldn't apply to everything

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and if you're dealing with live versions of a product, I wouldn't recommend this at all

smoky goblet Oct 15, 2025, 12:57 PM

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round pagoda Just came across the amazing talk by Keith Judge on Engine Upgrades. Says appare...

I also have never resaved all assets prior to or after doing an upgrade and we didn't do that at my previous employer either.
There may be specific instances (like he describes in a later slide) where you might need to spot save an asset.

dusky compass Oct 15, 2025, 2:04 PM

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re-save updates the headers for assets

smoky goblet Oct 15, 2025, 2:25 PM

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dusky compass re-save updates the headers for assets

For sure, I understand what it would do. But it seems like a mostly useless step since there's no reason why assets have to be at the most recent version.
Again, spot saving assets that might be multiple versions behind might be necessary. But resaving them all seems excessive.

hidden hedge Oct 15, 2025, 2:26 PM

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agreed

dusky compass Oct 15, 2025, 2:34 PM

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I dont know the supposed value/reason in the context of UGS
In terms of validation when you migrate to new version, validate (loads all into/through memory eventually) and resave allows to catch any issues like depretation or missing functions/props, if any

smoky goblet Oct 15, 2025, 2:53 PM

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dusky compass I dont know the supposed value/reason in the context of UGS In terms of validati...

That's important for sure, but you can run the CompileAllBlueprints commandlet (which I do) to catch those things. And/Or the DataValidation commandlet.
You don't need to actually save the asset to catch any of those things. CompileAllBlueprints is nice because it doesn't hit every asset in your project or source control so it can be really fast.

crystal linden Oct 15, 2025, 3:05 PM

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While reading about custom class filters for asset picking I came across this part that is seemingly used for certain types of filters done on UnloadedBlueprintClasses.

    FTopLevelAssetPath UnloadedAssetPath = InUnloadedClassData->GetClassPathName();
    FString GeneratedClassPathString = UnloadedAssetPath.ToString();

    IAssetRegistry& AssetRegistry = FModuleManager::GetModuleChecked<FAssetRegistryModule>(TEXT("AssetRegistry")).Get();
    // This query is slow so should be done last
    const bool bOnlyIncludeOnDiskAssets = false; // If it was in memory it would have used the other filter function
    FAssetData BlueprintAssetData = AssetRegistry.GetAssetByObjectPath(FSoftObjectPath(UnloadedAssetPath), bOnlyIncludeOnDiskAssets);
    if (!BlueprintAssetData.IsValid())
    {
        FString BlueprintAssetPath = GeneratedClassPathString.LeftChop(2); // Chop off _C
        BlueprintAssetData = AssetRegistry.GetAssetByObjectPath(FSoftObjectPath(GeneratedClassPathString), bOnlyIncludeOnDiskAssets);
    }

However I'm not sure how it's supposed to be used. I've tested this in my own contexts and the step where it generates an AssetData instance from either the class or the blueprint always seems to fail and generate none. Is there something I'm missing about that?

crystal linden Oct 16, 2025, 7:59 PM

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So I've dug a little more, and for some reason

AssetRegistry.GetAssetByObjectPath()

Fails to property copy the FAssetData object. I don't really understand why.

However

AssetRegistry.TryGetAssetByObjectPath()

Takes the return value as a reference and works. So cheers to that.

lament wasp Oct 18, 2025, 2:30 PM

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anyone else get random rebuilds when nothing has changed?

0>Building ProjectEditor and ShaderCompileWorker...
0>------ Building 4136 action(s) started ------```

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or does it need to rebuild the shadercompileworker every time i modify our project's .uproject? should i set engine/source/* and engine/plugins/* to read-only to ensure nothing changes?

round pagoda Oct 19, 2025, 12:34 PM

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lament wasp anyone else get random rebuilds when nothing has changed? ```0>Creating makefile...

I sometimes get large rebuilds if I haven't opened the project in a long time. But only on the project, I don't recall ever having to rebuild the engine.

round pagoda Oct 19, 2025, 12:34 PM

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lament wasp or does it need to rebuild the shadercompileworker every time i modify our proje...

IIRC I think it reads a last modified timestamp from uproject, even if the contents hasn't changed, it will rebuild "just incase"

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Running into an issue where artist machines using a precompiled version of Unreal are getting spammed with warning messages that assets are saved with empty engine versions. I assume that is coming from my source-build version of the engine.

Checked and it seems the version is empty? I thought this would at least set the version to the release branch its based on?

I am using the engine in a vanilla context, no modifications. Is there any way I can "safely" update it so that it thinks its the precompiled 5.6.1 so I can see the warnings, and prevent this happening in the future when I author assets?

LogLinker: Warning: [AssetLog] C:\Users\RemoteDeveloper\Documents\BGP\Content\Sound\SFX\Footsteps\Horse\SW_HorseStep2.uasset: Asset has been saved with empty engine version. The asset will be loaded but may be incompatible.
LogLinker: Warning: [AssetLog] C:\Users\RemoteDeveloper\Documents\BGP\Content\Sound\SFX\Footsteps\Horse\SW_HorseStep3.uasset: Asset has been saved with empty engine version. The asset will be loaded but may be incompatible.
LogLinker: Warning: [AssetLog] C:\Users\RemoteDeveloper\Documents\BGP\Content\Sound\SFX\Footsteps\Horse\SW_HorseStep4.uasset: Asset has been saved with empty engine version. The asset will be loaded but may be incompatible.

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I can actually find it in \Engine\Source\Runtime\Launch\Resources\Version.h, so what the hek is going on

lament wasp Oct 19, 2025, 12:50 PM

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round pagoda IIRC I think it reads a last modified timestamp from uproject, even if the conte...

so brittle.. should only if contents changed. accidently type in one and 4000 rebuild

smoky goblet Oct 19, 2025, 1:37 PM

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round pagoda Running into an issue where artist machines using a precompiled version of Unrea...

how are they getting precompiled binaries? There is a SetVersion UAT job that can set the version used here (there might be a batch file). UGS should be doing this automatically. If you're using UGS now, those assets could predate the switch. If you're not using UGS, it's something they'd have to run locally after getting latest.

What you're looking at there isn't enough. You also want/need the changelist number included in the version so that people can't sync & open assets saved with a newer version than they have, and mess up content they don't have the code to support.

round pagoda Oct 19, 2025, 1:55 PM

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smoky goblet how are they getting precompiled binaries? There is a SetVersion UAT job that ca...

I'm just pasting the files I can find in the source build. The binary saves seem to have an empty engine version, which is the issue.

Not using UGS.

smoky goblet Oct 19, 2025, 2:08 PM

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round pagoda I'm just pasting the files I can find in the source build. The binary saves seem...

If you're not using UGS you'll need to provide a way for artists to run the UpdateLocalVersion Commandlet
https://dev.epicgames.com/documentation/en-us/unreal-engine/versioning-of-assets-and-packages-in-unreal-engine
Or some other way to update the Build.version file in Engine/Build directory.

round pagoda Oct 19, 2025, 2:44 PM

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smoky goblet If you're not using UGS you'll need to provide a way for artists to run the `Upd...

The artists just use the precompiled, which is totally fine.

I just want to make it so that my source-compiled engine will save assets as-if it is a precompiled version (e.g. save assets like it is 5.6.1). Is there a setting I can flick to do that? It seems to have the 5.6.1 version already in the code

smoky goblet Oct 19, 2025, 2:48 PM

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Like I said, there's more than just the version from the code.
However you're collecting and distributing the compiled engine I guess could include the build.version file too.
As long as they don't have the right data in that file (or that file at all) you're going to keep having that problem.

round pagoda Oct 19, 2025, 5:35 PM

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smoky goblet Like I said, there's more than just the version from the code. However you're co...

I'm not distributing the compiled engine. Artists just use the normal launcher pre-compiled engine version

smoky goblet Oct 19, 2025, 5:42 PM

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If the artists resave the asset does the warning go away?
Why are you on a source build and they're on a launcher build? No wonder assets are confused.
Maybe just your build.version file is messed up then.

iron dome Oct 19, 2025, 5:45 PM

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It's what happens when you are missing the buildinfo json. It's totally harmless unless you're actually on different versions.

frank ether Oct 20, 2025, 9:56 PM

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Hi, I was just curious why wouldn't they expose aerofoils and thrusters array from the chaos movement component?

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It would be just so beneficial to be able to manage these arrays in runtime, because let's say we wan't to destroy an aerofoil at runtime visually, like ripping of a bone, but it wouldn't make sense when we can't change the calculation of the lift force behind the bone assigned.

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Is there a certain reason why those are not exposable or maybe I can suggest a change somehow? Thanks for any answer

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I could certainly calculate them myself in blueprints, but the c++ one is better and just much more stable and precise

round pagoda Oct 21, 2025, 6:07 PM

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smoky goblet If the artists resave the asset does the warning go away? Why are you on a sourc...

Yes, it does.

I am on the source build because I am doing C++ stuff and I like to reference and read engine implementations of stuff. I also need to build a dedicated server.

Artists don't need this and I don't want to complicate their workflow. Just keeping it simple, I ask they use the precompiled launcher. I am hoping/assuming there is an easy setting I can enable to just tell my source engine to save assets using its engine version.

round pagoda Oct 21, 2025, 6:08 PM

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iron dome It's what happens when you are missing the buildinfo json. It's totally harmless...

That's fine, can I add a build.json or change a setting to fix this?

I want the artists to not get spam warning messages. I know it is harmless, but it is harder for them to filter out normal warnings under all of this noise

iron dome Oct 21, 2025, 6:11 PM

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Yes. If you take their (I think) buildinfo.json from their editor and resave all your assets, submit them to source control and have them update them, it will fix the issue.

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The correct way to do it, though, is to use UGS to have it create the file for you. But that's a whole load of set up.

round pagoda Oct 22, 2025, 9:22 AM

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iron dome Yes. If you take their (I think) buildinfo.json from their editor and resave all...

Ok thanks, can you explain this in a little bit more detail?

I'm looking through the precompiled directory but can't find a build.json, is it called something else?
When I get it, what do I do with it? Do I rebuild my engine and then it'll now "stamp" all saved assets correctly?

round pagoda Oct 22, 2025, 9:23 AM

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iron dome The correct way to do it, though, is to use UGS to have it create the file for y...

Yeah definitely a bit too advanced and overkill for me at this time 🙂

iron dome Oct 22, 2025, 9:23 AM

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Honestly I don't know how it works with precompiled engines.

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I haven't used one this decade.

gloomy kelp Oct 22, 2025, 10:35 AM

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Howdy, is there a variant github that's not epic mirror A?
I'm only able to see ue5-main last updated 2 months ago while I see users speaking of a 5.7 branch and other items within a potentially more up to date ue5-main?

hidden hedge Oct 22, 2025, 10:36 AM

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?

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I'm not sure where you're seeing that it was last updated 2 months ago

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is that when you cloned it?

gloomy kelp Oct 22, 2025, 10:37 AM

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I'm new to building from source but on github the commit history for ue5 main is 2 months ago on my end. Wondering maybe I have made a clone then.

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But found it strange

hidden hedge Oct 22, 2025, 10:38 AM

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well where are you seeing this information?

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presumably not on github in a web browser

gloomy kelp Oct 22, 2025, 10:38 AM

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This was on github via Chrome

hidden hedge Oct 22, 2025, 10:38 AM

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so where (screenshot would be good) are you seeing this

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visiting which URL

gloomy kelp Oct 22, 2025, 10:39 AM

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I'll just grab a screenshot just be a couple minutes need to pickup food. Appreciate the help here

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If you can't get to it no stress tyty

hidden hedge Oct 22, 2025, 10:40 AM

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https://github.com/EpicGames/UnrealEngine/commits/ue5-main/ the latest commit I see here as of writing this message was from 3 hours ago

gloomy kelp Oct 22, 2025, 10:45 AM

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https://github.com/EpicGames-Mirror-A/UnrealEngine/branches
Maybe I'm on an incorrect mirror or taking updated as commit? But I swear I'm unable to see commits

heady sparrow Oct 22, 2025, 10:48 AM

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EpicGames-Mirror-A is not what you want... you want the "real" github repo sswires linked

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I assume this is some defunct perforce mirror?

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I am unfamiliar

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technically the regular github repo is also a p4 mirror

gloomy kelp Oct 22, 2025, 10:51 AM

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I always found it a bit sus I might go through an unlink relink incase accounts stuck to some legacy setup

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Appreciate the help y'all was goin a bit mental here XD

gloomy kelp Oct 22, 2025, 11:24 AM

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Seems to be a somewhat known issue. But unlink/relog/relink gave a fresh invite to the proper ue5-main, cheers

thick furnace Oct 22, 2025, 11:27 AM

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heady sparrow `EpicGames-Mirror-A` is not what you want... you want the "real" github repo ss...

due to org user limit there are mirrors in addition to main repo, newly subscribed users end up getting access to a mirror repo instead of main unreal one

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wasn't there forum post describing that?
https://forums.unrealengine.com/t/maintenance-on-the-epic-games-github-organization-june-2024/1891135
they eventually clean up to free slots
https://forums.unrealengine.com/t/maintenance-on-the-epic-games-github-organization-june-2024/1891135/36

gloomy kelp Oct 22, 2025, 12:25 PM

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Ahhh ty may have gotten the emails at the time but been a while since dug into it.

heady sparrow Oct 22, 2025, 11:42 PM

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thick furnace due to org user limit there are mirrors in addition to main repo, newly subscrib...

oh huh, I had no idea

vital hawk Oct 23, 2025, 7:12 AM

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thick furnace due to org user limit there are mirrors in addition to main repo, newly subscrib...

Didn't they roll back that change? Because it prevented newer members from accessing existing forks

thick furnace Oct 23, 2025, 8:45 AM

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vital hawk Didn't they roll back that change? Because it prevented newer members from acces...

it will prevent accessing forks (as it is different repo) if it was a fork it would be linked to original org
not sure about it, a friend of mine relinked in july 2024 (soon after they started purging) to get access to main repo

cosmic stump Oct 23, 2025, 11:27 PM

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