warningJava ErrorsAffects: All versions
How to Fix java.lang.RuntimeException
Fix RuntimeException in Minecraft by examining the 'Caused by' section in the crash report for the root cause.
Quick Fix
Check the 'Caused by' section for the real error. RuntimeException is a generic wrapper.
Error Message
java.lang.RuntimeExceptionHow to Fix
1
Read the full stack trace, especially 'Caused by' sections
2
Fix the underlying cause (missing file, wrong config, etc.)
3
Update the mod identified in the trace
4
Check data packs for errors
Common Causes
- Generic runtime error from a mod or plugin
- Failed resource loading
- Registry initialization failure
- Data pack loading error
Diagnostic Steps
- Open the crash report
- Scroll past RuntimeException to find the root cause
- Address that specific error
- Restart
FAQ
Why is the error so vague?
RuntimeException is a catch-all. The actual cause is always listed below it in the 'Caused by' section of the stack trace.