I'm on it. It has to do with the totally F***ed up way the VB PaintPicture() method works. I'm goign to have to switch over to calling Windows BitBlt() directly. Stay tuned. It's some work, but the end result shoudl be faster... Hopefully you guys can at least catch a glimpse of this before it crashes (try it when zoomed in or on a small, fast runnign sim with a small number of bots on a small field...