It worked for me also (Perl v5.16.2). It would be helpful if you could post some of the surrounding code.

Lexical variables are preferred to bareword filehandles. 

open my $fh5, ">>", "tagfile1" or die "Error: $!\n";

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You may want to take a look at perldebtut and use the debugger to make sure your code is actually reaching the open / print statements as suggested by quester.

And as always, 

use strict;
use warnings;

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In reply to Re: error in printing output of Data::Dumper to file by marquezc329
in thread error in printing output of Data::Dumper to file by prlusr

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