I did the MPLAB tutorial on stimulus files and their sample works fine. I made this stimulus file for myself, and it crashes MPLAB CYCLE RB0 1 0 500 1 750 0 1000 1 1500 0 I'm trying to figure out how to get around this. Clearly MPLAB shouldn't crash, but am I doing something wrong here? My experience is that usually when I start using a new tool I exercise corners an experienced user never would, so I sometimes run into bugs that haven't been fixed. So, does the above file look reasonable? -- Anniepoo Need loco motors? http://www.idiom.com/~anniepoo/depot/motors.html