Quote - Yes, the point was to make the distinction between running as a stand alone and running as a script within Poser.

Yea, I assume it was the app.Mainloop() that was crashing Poser, as I was doing all my learning from the wxPython forums/sites direct, and not specific to Poser.

Thanks to both of you for the replies, I am progressing, have a dialog, fields,, etc...and am working on tying it into my script.  :)