If you have made absolutely no changes, you'll want to check in the module to see how the variable or subroutine that you're accessing is getting exported. Are there conditions under which it's not exported? Maybe you should specify what you want to import into your script. For example, if you want to import the standard functions from CGI.pm, you add use CGI qw /:standard/;.

Also, you've specified a subroutine AND a scalar. Which is it? foo($text) is a function that you're calling and $main::foo is accessing the scalar $foo in package main.

Cheers,
Ovid

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