Error running Abaqus

Hello,

Any analysis I try to run in Abaqus fails and I get errors like the following:

 

---------- RUNTIME EXCEPTION HAS OCCURRED ----------
*** ERROR: standard.exe / rank 0 / thread 0  encountered a system exception 0xC0000005 (EXCEPTION_ACCESS_VIOLATION)

 

Can anyone tell me what's causing this? Is it a software error or a problem with the machine it's installed on?

Thank you