[Solved] Game crashes when I click Return To Main Menu Button

[inner pike]

Hi,
In Lecture 11 - Leaving the Game, When I click on ReturnToMainMenu Button game crashes and gives me this error

`Assertion failed: SessionInfo->SessionType == ESteamSession::AdvertisedSessionHost || SessionInfo->SessionType == ESteamSession::AdvertisedSessionClient [File:D:\build++UE5\Sync\Engine\Plugins\Online\OnlineSubsystemSteam\Source\Private\OnlineSessionInterfaceSteam.cpp] [Line: 648]

0x00007ffb54dd6d53 UnrealEditor-OnlineSubsystemSteam.dll!UnknownFunction []
0x00007ffb54dd7797 UnrealEditor-OnlineSubsystemSteam.dll!UnknownFunction []
0x00007ffb1c68587a UnrealEditor-MultiplayerSessions-0011.dll!UMultiplayerSessionsSubsystem::DestroySession() [F:\UnrealProjects\Blaster\Plugins\MultiplayerSessions\Source\MultiplayerSessions\Private\MultiplayerSessionsSubsystem.cpp:126]
0x00007ffb73bca8bc UnrealEditor-CoreUObject.dll!UnknownFunction [] ....`

Here is my code in line 126 of MultiplayerSessionSubsystem.cpp:

void UMultiplayerSessionsSubsystem::DestroySession()
{
    if(!IsValidSessionInterface())
    {
        MultiplayerOnDestroySessionComplete.Broadcast(false);
        return;
    }

    DestroySessionCompleteDelegateHandle =
        SessionInterface->AddOnDestroySessionCompleteDelegate_Handle(DestroySessionCompleteDelegate);
    
    if(!SessionInterface->DestroySession(NAME_GameSession,DestroySessionCompleteDelegate))
    {
        SessionInterface->ClearOnDestroySessionCompleteDelegate_Handle(DestroySessionCompleteDelegateHandle);
        MultiplayerOnDestroySessionComplete.Broadcast(false);
    }
} ```

can someone help me?

[glad verge]

Here's my code, you have a couple of differences there, check them out.

void UMultiplayerSessionsSubsystem::DestroySession()
{
    if (!SessionInterface.IsValid())
    {
        MultiplayerOnDestroySessionComplete.Broadcast(false);
        return;
    }

    DestroySessionCompleteDelegateHandle = SessionInterface->AddOnDestroySessionCompleteDelegate_Handle(DestroySessionCompleteDelegate);
    if (!SessionInterface->DestroySession(NAME_GameSession))
    {
        SessionInterface->ClearOnDestroySessionCompleteDelegate_Handle(DestroySessionCompleteDelegateHandle);
        MultiplayerOnDestroySessionComplete.Broadcast(false);
    }
}

cool tip, get Winmerge to compare code in 2 seconds

[inner pike]

Thank you,I replaced it but it's not working still and crashes with your code

[inner pike]

I tried the game in a project build, client can leave the session without any problem, but the above crash happens for host when he leaves the game

[glad verge]

mmm there must be more stuff then

copy paste the crash code here

[inner pike]

It's in the first comment:

Assertion failed: SessionInfo->SessionType == ESteamSession::AdvertisedSessionHost || SessionInfo->SessionType == ESteamSession::AdvertisedSessionClient [File:D:\build\++UE5\Sync\Engine\Plugins\Online\OnlineSubsystemSteam\Source\Private\OnlineSessionInterfaceSteam.cpp] [Line: 648] 0x00007ffb54dd6d53 UnrealEditor-OnlineSubsystemSteam.dll!UnknownFunction [] 0x00007ffb54dd7797 UnrealEditor-OnlineSubsystemSteam.dll!UnknownFunction [] 0x00007ffb1c68587a UnrealEditor-MultiplayerSessions-0011.dll!UMultiplayerSessionsSubsystem::DestroySession() [F:\UnrealProjects\Blaster\Plugins\MultiplayerSessions\Source\MultiplayerSessions\Private\MultiplayerSessionsSubsystem.cpp:126] 0x00007ffb73bca8bc UnrealEditor-CoreUObject.dll!UnknownFunction [] ....

[glad verge]

can you paste me the whole cpp file?

it will upload it as a file if you copy/paste the code

[inner pike]

Sure
just a moment

[inner pike]

here you are

[glad verge]

there is a ton of differences between my code and your code

my code is identical to Stephen's

I suggest using Winmerge to codecompare, not to lose your mind

[inner pike]

Sure, I'll give it a try, thanks 🙏

[glad verge]

for the Plugin making, really make sure you follow stephen's code to the letter, cause this part is probably the most difficult part of the course, maybe the only comparable one is LagComp, though this one should really be followed to the letter in order to avoid crashes or simply not being able to connect to the host.

[inner pike]

Yes I really got lots of problems in this lecture, thanks for your help
In joining sessions I had problem in joining when UsePresence was true, so I disabled it
maybe my problem is because of that
I try re-enabling it and see what happens

[glad verge]

yeah I also made a few mistakes back then and stuff just either wasn't compiling or I was getting crashes, easiest way to go through this part is just to code compare with winmerge.
I used to get Stephen's code and compare it with mine and after that, it was all working properly

[inner pike]

Thanks for introducing this software 👍

[inner pike]

I enabled UsePresence and it did the work
I no longer get the crash message
I just should try it on another machine and see can I join the session

[inner pike]

It works completely fine 😍

Game crashes when I click Return To Main Menu Button [Solved]