Yes, the packages did have use Exporter, @ISA, and @EXPORT properly defined. Aha... I think I found the problem. The poorly written code seems to have a mismatched brace, causing the package main; to operate within a code block. I tried to duplicate my situation with some code, but apparently it didn't complain about varaiable declaration. i.e.:

package MYMODULE::THING;
use Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(Func1 Func2);

sub Func1 {}
sub Func2 {}

package main;
import MYMODULE::THING;

$somevar = 1;
@somearray = (1, 2, 3);
...
[download]

...works fine. It appears I need to dig further into this junk. Thanks.