I have a strange fatal error

FATAL ERROR LOG
Stack Overflow
SYS Thread-ID: 500
Module: EH
Error Codes: EH: 12 Sub: 0(0) OS: 0 XPP: 16
Call Stack of Thread 1 (500):

Generally this happens when there is a error in the error logging. But my error 
doesn't happen with debug = yes.
I test several times with same result :
debug = no -> fatal error
debug = yes -> no error

So I can't debug and I don't understand this.

Christian Laborde

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