Yes this is wrong :-) It parses like: 
   $PAHASH->{$key}->[$index]
#  hashref-> hash ->array

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While you want 
   $PAHASH{$key}->[$index]
#  hash element ->array

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Which can also be written as 
   $PAHASH{$key}[$index]

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update: Or maybe you want 
  ${$PAHASH{$key}[$index]}

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If you really want the value as a reference to a scalar (I don't see the point of doing it)

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^5: Problem with DBM hash of anonymous arrays by Joost
in thread Problem with DBM hash of anonymous arrays by travisbickle34

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