I am running a "clean install" of Active State 5.20 for Windows on a laptop - no additional ppm installs. The result is that your script works just fine - no problem. I do not have a Mac, but I've given Tk code before to folks who do and it works fine (although that was before 5.22).

I confess to being flummoxed at this point.

Update: Oh, since latest Mac OS'es are linux like, there may be a path problem between this new latest AS installation and the system's idea of Perl? What does Perl -V show?

In reply to Re^3: OS X ElCaptain Activeperl Tk by Marshall
in thread OS X ElCaptain Activeperl Tk by Anonymous Monk

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