The author's response (i tried it and it works, with sub IMPORT) :

This is not a bug in the module.
The problem is that you specified:

sub subr :Export(:DEFAULT) { return "subr() was called\n"; }

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:DEFAULT exports are only exported when the module is use'd with no arguments at all.
But then you call: 
use Mod3 'argument';

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with an argument, so the :DEFAULT exports don't happen.

You could fix this by specifying:

  sub subr :Export(:MANDATORY) { return "subr() was called\n"; }

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(assuming you always want subr() exported).
If not, then you need to specifically request subr(), like this: 
  use Mod3 '&subr', 'argument';

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or request all the defaults, like this: 
  use Mod3 ':DEFAULT', 'argument';

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In reply to Re^4: How to pass an argument to a Module? by mascip
in thread How to pass an argument to a Module? by mascip

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