First off, unless things have changed since I got perl2exe, you can't use the -gui flag with the trial version. Second, you should start your program from a DOS window, so any error messages will persist long enough to read them. More than likely, if you are just doing a "use Tk;", you will also have to add uses for the individual widgets, e.g. "use Tk::Canvas;", etc. The documentation file that comes with perl2exe explains all this.