When perl fails to encode utf8 on windows env http://www.i18nqa.com/debug/utf8-debug.html

utf8-debug.pl

use strict;
use warnings;
use Encode qw( encode decode );
my $code_points = decode('UTF-8', 'é');    # This is a 'é' char
my $cp1252 = encode('cp1252', $code_points);
print $cp1252;