Troubleshooting Your Project Zomboid Server

Here are some Project Zomboid server issues and how to fix them.

No Space Left On Device

This is a bug that can occur with Project Zomboid, regardless of how much space is left on the server, resolve this by doing the following:

Incompatible Or Conflicting Mods

• Undo your latest changes, this includes removing mods.
• Make sure all of your mods are compatible with the current version of your Project Zomboid server.
• Double-check that your mods aren't missing any dependencies.
• Remove all of your mods.
• Begin testing mods and their dependencies one at a time.

Out Of Memory Crashing

The more mods, and the more friends you have connected, the more resources your server will need to run.

You can check the crash logs by going to Console, then scrolling down to Recent Activity and clicking View audit logs. If it reports the server crashed due to running out of RAM and this is happening frequently you will need to upgrade your server.

• We only recommend upgrading when it's necessary to match the demands of your server.
• It's also possible that one of your mods has a Memory Leak. In that case you will need to remove mods until you find out which mod is causing the problem.

Malformed Packet Detected

Players kicked or banned with this message have been flagged by the built-in anti-cheat. The message sometimes includes a type number:

Malformed packet detected.
Malformed packet detected type 22

Mods are the most common cause of a false positive.

• Remove or update the mod that triggers it.
• Or open pzserver.ini and set the matching AntiCheat* option to 3 to only log it, or 4 to disable it. Our guide on configuring anti-cheat covers what each option checks.

World Loading Could Not Proceed

This error stops your server from starting, or stops players from joining:

zombie.world.WorldDictionaryException: World loading could not proceed, there are script load errors...

If it's paired with a java.io.FileNotFoundException pointing at a mod file path, the cause is mod file case sensitivity. Follow our guide on fixing mod case sensitivity to turn on the automatic fix.

Otherwise, check whether any of your mods updated recently. If an update removed an item, your world still expects a script that is no longer there. Roll that mod back to its previous version, or reset your world if you're willing to start fresh.