I personally have not been able to reproduce the error message and that's why I was not able to narrow down the problem. The error is occasionally produced when the application is used by web users. Unfortunately the CGI::Carp does not show the line where the error is occurring.

The following two lines are part of the script.

use strict;
use warning;
[download]

May be I need to try the autodie module and see if it helps.

Sorry for being vague with my statement: "The scripts are pretty big ..."