Hi Nick - Andrew just beat me to a detailed explanation (which was in any event much better than the one I could have given you :)) but I may have a simple fix for you. I notice you are using: import OpenGL.GL as gl try replacing this with: import VisionEgg.GL as gl When I import the OpenGL package instead of the VisionEgg package in some of my working code, I get the same error you do. -- jds ====================================== The Vision Egg mailing list Archives: http://www.freelists.org/archives/visionegg Website: http://www.visionegg.org/mailinglist.html