Tk::Error: Not a CODE reference at C:/Perl/site/lib/Tk.pm line 251.
 Tk callback for .frame.frame.button3
 Tk::__ANON__ at C:/Perl/site/lib/Tk.pm line 251
 Tk::Button::butUp at C:/Perl/site/lib/Tk/Button.pm line 175
 <ButtonRelease-1>
 (command bound to event)

##</code><code>##

use warnings;
use strict;
use Tk;
use Tk::Text ;
use POSIX 'strftime';
my $DATE = strftime("Run Failures.pl for %dth %b %Y" , localtime());
my $mw = MainWindow->new;
my $filename = "c:\\Temp\\perl.txt";

$mw->geometry("720x500");
$mw->title("   backupadmin  ");

my $main_frame = $mw->Frame()->pack(-side => 'top', -fill => 'x');

my $left_frame = $main_frame->Frame(-background => "snow2")->pack(-side => 'left', -fill => 'y');
my $right_frame = $main_frame->Scrolled("Text", -scrollbars => 'se',-background => "black",-foreground => "yellow",-height => '44')->pack(-expand => 1, -fill => 'both');


my $failures_button = $left_frame->Button(-text => "  $DATE ",
                                -command => \&runscript)->pack;
my $Close_button = $left_frame->Button(-text => '                       Close                       ',
-command => $mw => 'destroy')->pack;	
my $Help_button = $left_frame->Button(-text => "                  Help Guide                   ",
                                -command => \&load_file)->pack(-side => "bottom");


	

my $Close_help = $left_frame->Button(-text => ' Close Help ',
          -command => \&clear_file )->pack(-side => "bottom");

		  

MainLoop;
sub runscript {
  system("daily_failures.pl");
# or if it takes some time to run the script
  #system("daily_failures.pl &"); # runs in the background
}

sub load_file {
  open (FH, "$filename");
  while (<FH>) { $right_frame->insert("end", $_); }
  close (FH);
}
sub clear_file {
    $right_frame->delete('1.0','end');
    $right_frame->packForget;
}