I am on a Quadra 610, 16 ram, system 7.5.5. I've used Macperl 5.0.7 with virtually no problems. But now it hangs if I try to open a file. I can still run previous droplets and scripts. I just rebuilt the desktop and run Nortons utilities, but the problems remains. Also, I just downloaded 5.1.0 and I get the same problem. Any suggestions? TIA Darryl