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#!/usr/bin/perl -w

...
        print ">>> $after // $info\n"; # to see the timer go
    }
}

can't invoke "winfo" command:  application has been destroyed
    while executing
...
    invoked from within
"ttk::Repeat"
    ("after" script)

C:\>perl --version

...
Complete documentation for Perl, including FAQ lists, should be found 
+on
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+ the
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+ge.