However, a slight breakthrough. I've discovered that I can get the "File Access Denied" error message every time if I make the pcf file read only. I have no idea why this should cause the problem because Mover doesn't write to the pcf file (or at least it shouldn't). I'll have to go through the source code line by line to try and fix this one. Also, it's difficult to see how the pcf file could accidentally have become read only on coldrake's machine and Tygerlander reported that her pcf wasn't read only any way. Hours of fun ahead I think.