Thanks for the reply. I know exit causes the program to exit, but I believe the call to the subroutine preceding the exit statement should cause the message window to display before the program exits. I know sub timedDialog executes because I inserted a print statement in it and it does indeed print but the message window never displays; and I put a sleep statement between the sub call and exit in hope of allowing time for the message to display but no go.

I just noticed I called timedDialog both in sub checkDays and in sub setupGUI I fixed this and still no message shows

Fixed code follows

#!/usr/bin/perl
######################################################################
+##
use strict;
use warnings;
use Tk;

my $mw = MainWindow -> new;
my $timedDialogTitle = '';
my $timedDialogText = '';
my $svBtn = undef; #Option window SAVE button.

&setupGUI;
$mw->deiconify();
$mw->raise(); 
MainLoop;
exit(0);

################################################
################################################

sub setupGUI{

    $svBtn = $mw->Button( -text => "SAVE", -command => sub {&checkDays
+; exit(0);});

    $svBtn->grid(-row => 9, -column => 2, -sticky => 'e');

    $mw->bind('<KeyPress-Return>' => sub {&checkDays; exit(0);});

    $mw-> withdraw();

}
#####################################

sub checkDays {
                &timedDialog("Exiting", "O.K., no backup will be made,
+ then....Exiting", 25_000);
                sleep 15;
    }
#####################################

sub timedDialog
{
print ("in timedDialog\n");
my $subwindow = MainWindow->new;
    $subwindow->geometry("490x150+400+400"); 
    $subwindow->title($_[0]);
my $label = $subwindow->Label(-text => $_[1]);
$label->pack;
$subwindow->after($_[2], sub {$subwindow->destroy;});
}
#####################################
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