simulation does not start - error output file

Hi everybody,

today I ran a static analysis with optistruct (on my pc, I own a stand alone licence) the solver view page opened but nothing happened,

then I noticed the solver gave me an output void file named: modelname.err_2564, I looked for that error on the internet but didn't find anything;

after that I ran again the simulation and I got another error file named in a different way,

what I did then was:

1- exported the solver deck and ran it directly from optistruct, instead of running it from hypermesh (nothing happened)

2- shut down all activities in the task manager and run again the simulation (nothing happened) 

3- I finally re-installed the solvers but nothing different

Is there anybody who already faced this problem?

thanks for your replies