I have run into some issues which I will try to describe. perl -d:ptkdb test.pl (The debugger pops up no problem) However, when I mouse over the TK debugger window the mouse movement coredumps the application. It basically gives a message "Illegal instruction". I was able to successfully test run a "Tk" application with no problems. So, I think the problem lies with the "ptkdb". Thank you once more for your invaluable help.