When load big files EMC2 corrupts

Hi Alexamc,
Segmentation faults are almost always due to memory errors or memory controller being faulty, so you can try removing all but one memory banks from computer and test to see if you get the same error, test all banks one at a time ( if you have more than one memory modules of course ).
You have also latency problems, so set a higher base thread.
Regards,
Tom