This error is probably bigger than a web forum can handle, but let's give it a shot anyway:
What version of the software are you running?
Have you updated all of your drivers?
In your simulation, are you simply dropping a block? Or do you have contact surfaces and other complexities?
What are your computer system specs?
Are you running the software off of a network? Or locally?
Is the file located on a network?
Do you have rights to the event simulation capability?
Is your license node-locked, or floating?
Have you checked to make sure your video card can handle the simulation output?
At one point in the analysis does this error occur? Immediately? After the model verification? Memory Allocation? During the analysis?
I'm sure there are more questions, but this is a start.
GBor
Garland E. Borowski, PE
Engineering Manager
Star Aviation