criticalServer ErrorsAffects: All versions
How to Fix Chunk Corruption
Fix chunk corruption by deleting or restoring corrupted region files, or using MCA Selector for precision fixes.
Quick Fix
Delete the corrupted region file. The chunk will regenerate with fresh terrain.
Error Message
Error: Chunk file at X,Z is corruptedHow to Fix
1
Identify the region file from coordinates: r.(x>>5).(z>>5).mca
2
Delete the specific corrupted .mca file from the region/ folder
3
Restore the region file from a backup if available
4
Use MCA Selector to inspect and fix specific chunks
5
Check disk health for hardware issues
Common Causes
- Region file partially written during crash
- Disk errors affecting .mca files
- Mod corrupting chunk data during world generation
- Out of memory during chunk save
Diagnostic Steps
- Note the chunk coordinates from the error
- Calculate the region file: divide chunk X and Z by 32, round down
- Find the file in world/region/r.X.Z.mca
- Delete the file or restore from backup
- Restart the server
FAQ
Will I lose builds if I delete a region file?
Yes, all builds in that region (512x512 blocks) will be lost. Use MCA Selector to delete only specific corrupted chunks instead.