Ok what if there isnt a variable called PYTHONHOME? I'm running windows98se. What do I need to do? What should the line read? Is it PYTHONHOME=D:Program FilesCurious LabsPoser 4Runtime? And where do I enter this? Is it a line in the autoexec.bat file? I wonder why some python scripts run but others do not. I was gonna paste what was listed when I typed "set" but I'm not sure how to do that either. Thanks, David