Andy, Pixels are locked, and I have another gworld in my app that does the gworld copying to itself thing. I tried creating another gworld and copying the area to it... still crashes :( Thanks for the try, Al > I think the error message is trying to tell you something :-) > The memory address has moved - you either have an invalid address or > haven't LOCKEDPIXELS > I've never tried copying a bit map to itself before so it may be getting in > a tizz there if the > memory locations overlap in some way. > Try copying to another gworld then copy back. ================================================= McHurricane: Macintosh Storm Tracking Software http://members.aol.com/stormeye email: aboyd@... =================================================