The scope of the file handles might be the problem for the failing situation. Perhaps: 
use strict;
use warnings;

[download]
will reveal a number of issues. I tend to use "open my $fh" rather than hard-coded handles. I also tend to store the generated file handles in a dictionary hash rather than rely on being able to sort scoping problems out.

Everything but the troll

In reply to Re: Error Module not working in Browser, Help! by DungeonKeeper
in thread Error Module not working in Browser, Help! by Anonymous Monk

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