Not initializing a variable is something that has bitten me before! And, of course I assume right away it is my code or logic and not something simple. (Usually, it ends up being a combination of both!)

Would this snippet meet your needs?:

foreach my $line (@customerarray) {
    my ($memono, $cusref, $datestamp) = split '::', $line;
    if ( ($timestamp - $datestamp) > 1296000 ) {
        next;
    } else {
        $line = $line . $line . "\n";
    }    
}

print FH "$item";
[download]

I hope this is somewhat helpful.

Jamie