http://www.perlmonks.org?node_id=270605


in reply to Tk failure

Main problem is that you never call MainLoop().

The following code does what you seem to want without the need for the $ep variable (and I didn't include the $TEST stuff because it's not relevant to the problem that I can see):
use Tk; my $PATH = "/opt/adacs/test/$TEST/.saved_poins"; open( RF, $PATH ) or do_err_window() && exit; print "This got executed\n"; sub do_err_window { my $fail = MainWindow->new(); $fail->geometry("250x150"); $fail->Label(-text => "File Failed To Open!")-> grid( $fail->Button(-text => "Acknowledge", - command => sub { exit} ) ); MainLoop(); }