I'm trying to develop a OO shopping cart in perl and am having problems in one area. I have a Info object that collects information about the products being added to the cart. The blessed hash ref looks like this. 
$hr = {
         _orderid => '',
         _items   => [],
      };

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To add an item I use this. 
sub set_items { push @{ $_[0]->{_items} }, $_[1]; }

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This all seems to work right within this module, but when I use this module in another module I get a can't use an undefined ARRAY as a ref error. Somehow the array can't be seen from the module, but the other element (orderid) can. Any help, suggestions, would be great.
Thanks!

In reply to OO problems by steveAZ98

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