Every time I start a simulation on fluent and leave it running for a few hours, I always go back to find that fluent solver is closed with a random error message on the screen saying that the solver has stopped (only workbench is open). It usually does this after 4-5 hours of running time. I usually notice it in the morning after leave it running over night.. I have checked my PC power settings and nothing seems to be causing this weird interruption. I am running Ansys Student 19.2. Any suggestions would be appreciated.