Today I got a critical error on startup: java.lang.IllegalArgumentException: Comparison method violates its general contract!

see [pastebin.com]

Any ideas?



Edited 1 time(s). Last edit at 09/17/2016 09:59PM by ifox.

Do you have Java 9? I think there are some issues with FRD and Java 9, so you could try Java 8 instead.

I have Java 7u80. There had to be some temporary glitch, I could not reproduce it anymore.