Computations in Abaqus with multiple cpus exited with an error

Hi every body,

I'm trying to simulate an abaqus job with mutiple cpus using the command

abaqus job=job.inp user=user.for cpus=8 double

the job exited with an error in the subroutine (some variables are found to be 0).

but when using the command

abaqus job=job.inp user=user.for double

the job completed, 

I have to performs computations with mutiple cpus for gain of time but without succes.

any help please.