Unfortunately, I don't have any further details on that - sorry.
MIR simply crashes.
Now I have a new machine - 2 x Intel XEON L5640 - and experience same behavior, I'm afraid.
When I just change the output MIC to Surround standard, MIR crashes imediately. No error message, no information.
I know, this doesn't help, but I have nothing else, I could report.
Hopefully, MIR 1.2 doesn't have this problem anymore ;-)