Sampat Kumar
Ansys Employee

Hi Pouyan,
Do you get any errors when your model crashes? Do you face this crashing error with every model or with the specific model only?
Have you tried to clear the %appdata% and change the name ".Ansys" in the %temp% file? I have seen that some users have resolved this type of issue by resetting the ansys through %appdata%.
Does the mechanical window close after crashing or does the WB window also close?