Every module is evaluated at use time, but normally a module contains only sub definitions, so nothing is run then (except import() )

BUT if you do unusual stuff like grandfather demonstrated in his first example ScrewyModule.pm , i.e. code is outside of any sub at top level then something like you described can happen.

But that's speculation cause you are not showing us any code.

So please either

• play around with the examples given to see if it might happen to you
• use Carp (see cluck() and confess() ) to force a stack trace at the beginning of the "weird" sub to track down the location of your problem.
• shorten your problem manually to code isolating your problem and show.

Anything else won't lead to results.

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