I have a Simulink model that very occasionally decides to pause on its own. As far as I know, I don't have anything in the model or settings that should make it pause. Almost all of the time it runs to completion. But every now and then I run it and it decides to pause, usually once, sometimes twice. When it pauses, different runs pause at different times. Not a problem if I'm sitting at my computer because I can just hit the play button to continue. But if I had to leave while it was running, it would be annoying to come back and see the simulation paused. Any idea how or why this happens?