Okay, I installed ActiveState's Perl on my system, and now it tells me that it can't find perl5db.pl. I searched the archives for perl5db.pl and @INC, but found nothing helpful. Here's the error message I get: Can't locate perl5db.pl in @INC. I get this when I run the sample script hello.gpl and when I debug GUI.pm. My @INC has the following in it: D:/AS-Perl/lib D:/AS-Perl/site/lib