Project Zomboid B42 — Server Fails to Start (Out of Memory)

## Summary

On Project Zomboid Build 42 (B42), servers with 8GB RAM or less may fail to start with a Java Memory Error. This is caused by an overly aggressive default Java heap allocation, not corruption or mods.

## Affected Systems

- Project Zomboid Build 42
- Servers with 8GB RAM or less

## The Cause

B42 ships with in , which tries to allocate 8GB of Java heap — leaving nothing for the OS and other processes.

## Solution

- Go to **Files** tab in your panel
- Edit **ProjectZomboid64.json** in the root folder
- Find the line
- Change it to a lower value based on your RAM:

- 8GB server →
- 6GB server →
- 4GB server →

- Save and restart the server