# Project Zomboid Server Troubleshooting (/docs/project-zomboid/fix-issues)



Sandbox Changes Not Applying [#sandbox-changes-not-applying]

Delete `map_sand.bin` from the save folder and restart. This forces the server to reload sandbox settings.

Mods Not Loading [#mods-not-loading]

* Use **semicolons** (not commas) in `Mods=` and `WorkshopItems=`
* Workshop IDs and Mod IDs are different — get both from the mod page
* B41 mods don't work on B42

"Failed to Connect" [#failed-to-connect]

* Check ports 16261 + 16262 (UDP) are open
* Verify password if set

Can't Become Admin [#cant-become-admin]

Run `setaccesslevel PlayerName admin` in the server console before the player connects.

B42 Memory Issues [#b42-memory-issues]

B42 requires 8-9GB+ RAM. Reduce population multiplier if needed.

Related Guides [#related-guides]

* [Server Configuration](/docs/project-zomboid/server-config)
* [Admin Commands](/docs/project-zomboid/admin-commands)
* [Performance Guide](/docs/project-zomboid/performance-guide)