Whenever I play Rebellion using RebEd, as soon as I start a new game, it gives me that "This program has performed an illegal operation" and closes the game. This is after I get through the ship sequence, but before the robot starts talking. I have reinstalled the game, updated the game, etc. However whenever I play Rebellion without RebEd, it works just fine. Edit: Alright, after some tampering I found the source of the problem. Apparently raising/lowering the troop or squadron amount on the ships causes the game to crash.