Avoid the issue. Use a prompt module. 
use strict;
use warnings;
use IO::Prompt::Hooked;

my %opt = (
    message  => "Enter text (1-255 characters) to send to clients: ",
    validate => qr/^.{1,255}$/,
    error    => "You have exceeded the limit of 1-255 characters - Try
+ again\n",  
    escape   => qr/^END$/i,
);

while ( my $result = prompt(%opt) ) {
    print ">>$result<<\n"
}

[download]
Bill

In reply to Re: do until loop breaks before meeting the condition by BillKSmith
in thread do until loop breaks before meeting the condition by thanos1983

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