Hi, I have this error when I select different month in the drop down box then hit "print value" any body know why or how to fix the error? There are no error if I don't click on the drop down.

Thanks in advance.

Tk::Error: Can't call method "butUp" on an undefined value at C:/Perl/site/lib/T k/BrowseEntry.pm line 375. <ButtonRelease-1> (command bound to event) Code 

# BrowseEntry, entry with listbox to select list values.

use strict;
use warnings;
use Tk;
use Tk::BrowseEntry;

my $month = "January";


    my $top = MainWindow->new;
    my $f = $top->Frame->pack;
    my $top_f = $f->Frame(-bg=>'red', -width=>'200')->pack;
    my $bot_f = $f->Frame(-bg=>'red', -width=>'200')->pack;
    my $c = $top_f->BrowseEntry(-label => "Month:", -variable => \$mon
+th);
    $c->pack;
    $c->insert("end", "January");
    $c->insert("end", "February");
    $c->insert("end", "March");
    $c->insert("end", "April");
    $c->insert("end", "May");
    $c->insert("end", "June");
    $c->insert("end", "July");
    $c->insert("end", "August");
    $c->insert("end", "September");
    $c->insert("end", "October");
    $c->insert("end", "November");
    $c->insert("end", "December");

    
    $bot_f->Button(-text => "Print value",
        -command => sub {
            print "The month is $month\n";
            $top_f->destroy if Tk::Exists($top_f);
        }, -relief => "raised")->pack;

    
    
    MainLoop;

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In reply to Perl TK BrowseEntry error by fast

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