Grzegorz Dostatni <grzegorz at ee.ualberta.ca> wrote: > File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 2310, in selection_present > return self.tk.getboolean( > TclError: expected boolean value but got "" I guess: Tcl needs a boolean value and gets an empty string? Try to look in this direction. Mike