So do I understand correctly that @allkeys = keys %$alldrug; is the line that is throwing the error? What does print pp($alldrug); show, and if that shows undef, what does print pp($tree); show?

Also, note that there are much better modules to parse XML than XML::Simple! I would recommend either XML::LibXML or XML::Twig.

In reply to Re: Not a HASH reference by haukex
in thread Not a HASH reference by pdahal

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