How to Use Build 42 on Your Project Zomboid Server

Important!

WE STRONGLY ADVISE TAKING A SERVER BACKUP BEFORE FOLLOWING THIS GUIDE!

Build 42 is Unstable. Notes below from the developers:

– For the best experience you are STRONGLY advised to play on whitelisted servers or in Steam co-op.

– It is currently inadvisable to have more than 20 players on a server. This will be further improved.

– Please do not use debug during MP games. This will impact negatively on server performance.

– Please disable all mods. Even client ones.

– Ragdoll functionality has been disabled in MP. This will be added in later patches.

– Please be aware that future updates to the Unstable branch WILL disrupt ongoing MP games.

– Saves created before Unstable 42.13 are no longer compatible. The conversion process will very likely break elements of your game. Please back up your save before continuing, after which debug could potentially be used to restore any lost items, animals, carrying capacity and player attributes.

Your server must be STOPPED before proceeding.

Note:

Make sure to start your server for the first time so that the .cache folder can be generated.

1. Update Your Steam Installation

On Steam, set your game to use the Unstable beta branch.

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2. Change the Server Name (Recommended)

This will force the server to generate a new world, and preserve the old world.

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3. Set the Beta Branch to “unstable”

Inpute the exact text: unstable

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4. Perform a Server Reinstall

On the Settings page, press the “Reinstall Server” button.

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5. Adjust the Java Arguments

On the Files tab, open the ProjectZomboid64.json file and edit the line containing the “-Xmxg” argument. It will likely be displaying as “-Xmx6g” or another value. Change the number to be 2 less than the amount of RAM your server has in GB. For example, an 8GB server should be “-Xmx6g” or a 6GB server should be “-Xmx4g”.

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