The model is supposed to be running 10 iterations 750 time steps. The disk has plenty of space. The model has run for 4 to 7 iterations before failing for now apparent reason. I am trying to eliminate any external forces that might be sabotaging the run. (anti-virus programs, agency software updates, etc). Any other ideas that might be causing the failure.
It could be a RAM issue. The amount of RAM required depends on the specifics of your model run, so we would need to look at the specifics of your run to determine the cause.