Code below works as expected except for chmod which does not make the output file read only. I changed from bareword OUT to lexical $OUT after searching thru other PerlMonk wisdom. What is wrong with my $OUT in chmod? 
sub writeOutput {
    my $outScalarRef = shift;
    my $OUT;
    my $date = localtime();
    $date =~ s/ /_/g;

    open ($OUT,">$$outScalarRef") 
    or open ($OUT,">$$outScalarRef-$date") 
    or die "Cannot open file $$outScalarRef : $!\n";

    print $OUT @stuff;
    close $OUT;
    chmod 0444, $OUT;
}

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In reply to Why doesn't chmod work on this lexical filehandle? by williff

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