I'm running a code that should run for multiple iterations (30 finally, but only 5 while I'm testing it). On the third iteration, the .fil stops being generated and so the code stops in error, but it is generated for the first 2 iterations. Why could this be, and how can I solve this?

What file would I edit to change the loads on the nodes to different sized loads? What if I wanted to have a P1 higher than P2?

I am running a dynamic analysis by applying a sinusoidal pressure onto a part over a period of time. If I only want MATLAB to extract the results at a specific time to help speed up the programme, how would I achieve this? I.e., if I wanted the stress across part when they are at their maximum, or their minimum or the result at the final time? Rather than the stress across the part at each time step, which causes will take my programme over an hour to run.