I tried with several Perl versions and both values break the GUI

Applying Kordaff's suggestion to your code works perfectly for me. ie.

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

my $mw = MainWindow->new;
my $text = "\x{1F642}";

$mw->Label(-text => $text)->pack;

MainLoop;

[download]

This produces a window with the smiley char. I'm using Tk 804.032 on perl 5.20.3.

In reply to Re^3: Tk UCS-2LE:code point too high by hippo
in thread Tk UCS-2LE:code point too high by Anonymous Monk

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