Help! (b42mp) Some players getting file mismatch errors upon joining my rented server | Project Zomboid | Page 1

opal gust Dec 19, 2025, 2:51 AM

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Hi! I am renting a server on Cybrancee with b42 on, and one of my friends and I can join with no issues, but the third keeps getting errors about some txt and lua files not matching the server's.

I sent her these "mismatched" files (from the server's files, for her to replace with her own), but more keep popping up that "need to be replaced" to match the server's.

The first that popped up was the character traits txt file, which had some true/false differences in the new insomnia trait. I will post screenshots of all these references. Then, she kept getting errors in mismatching lua files, which we tried patching up one at a time, and we figured more would just pop up.

Is there a way to ensure these files are synced and everything? Also, how come I had no issues connecting (again, rented server, not hosted on my computer), and the same went for the first person, and these errors only struck the second?

Note: In the screenshot of the insomniac and sleep traits differences, the _o file is the server's original character_traits.txt file, the _b file is my friend's file before we attempted to replace. I lined up the two to see what was even different to begin with.

Screenshot_2025-12-18_at_10.49.23_PM.png

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*Update

From what I am understanding, a hotfix has been released. My server host is requiring me to input "unstable" and it seems to match my current "unstable (back-up first blah blah)" opt-in selection on Steam.
Should people attempting to join use the hotfix, or the "unstable" opt-in version?

torn cypress Dec 19, 2025, 3:00 AM

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It's a problem with this server; I'm playing on another one and it lets me in perfectly fine, without needing to touch the files.

opal gust Dec 19, 2025, 3:01 AM

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A problem with the server's files, the host, or? What beta opt-in version are you using, if you don't mind sharing

bright girder Dec 19, 2025, 3:37 AM

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Did you set DoChecksumLUA (or whatever it is) to false?

opal gust Dec 19, 2025, 4:06 AM

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oh that might be it, i will get back to you

vagrant harbor Dec 19, 2025, 6:02 AM

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opal gust oh that might be it, i will get back to you

hi did u find a fix on this?

opal gust Dec 19, 2025, 6:02 AM

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hey, not yet - i'm waiting to troubleshoot with my friend

vagrant harbor Dec 19, 2025, 6:03 AM

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pain

opal gust Dec 19, 2025, 6:03 AM

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pepeW

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time zones

vagrant harbor Dec 19, 2025, 6:05 AM

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in your servername.ini change DoLuaChecksum=true to false

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works for me

waxen steeple Dec 19, 2025, 6:08 AM

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are you sure everyone is on either b42.13 or b42.13.1

bright girder Dec 19, 2025, 8:21 AM

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waxen steeple are you sure everyone is on either b42.13 or b42.13.1

they can still join the game if they're on .13 and the host is 13.1, I've found. They just get sent to the Zomboid backrooms. The error above I experienced from the Checksum being flagged true

waxen steeple Dec 19, 2025, 8:26 AM

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I'm not sure what the problem is. The game should work I would think (mine does) with checksum true

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maybe it's a specific os?

hasty widget Dec 19, 2025, 12:50 PM

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Did you switch to the hotfix branch and have players joining through the Unstable version?
This error happens due to that usually.

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I seriously recommend against disabling the checksum, you basically allow connections from different versions and custom files with that, breaking the server

opal gust Dec 24, 2025, 9:21 PM

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hi, sorry for not getting back with an update.

UPDATE:

in servername.ini changing DoLuaChecksum to false fixed the issue

thanks @vagrant harbor and @hasty widget

hasty widget Dec 25, 2025, 12:33 PM

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I really recommend against ever setting the checksum to false

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It did not fix the issue, you simply ignored it, thats what the checksum does, setting it to false means "ignore errors"

#Help! (b42mp) Some players getting file mismatch errors upon joining my rented server