note j1n3l0 Thanks for your insight.</p> I've discovered the root of my problem was a typo in package Foo:</p> <code> package Foo; ... use MyDemoTypes "DataFromFile"; # should be MyTypes "DataFromFile" ... </code> All works now (with your suggestions). I knew it would turn out to be something trivial. Thanks again :)</p> <!-- Node text goes above. Div tags should contain sig only --> <div class="pmsig"><div class="pmsig-558246"> <hr><i>Smoothie, smoothie, hundre prosent naturlig!</i> </div></div> 863095 863436