$$keyptr is undef. (Well, it could be the result of $curuser being undefined, but that would also get you a warning earlier.) Assuming that's normal, 
$$keyptr = $$db{CurrentKey} = $SavSubtree[$curuser][$$db{RSubtreeno}];

if ( defined($$keyptr) ) {
   my $datapos = $RSubtree{$curuser}{$$keyptr};
   if ( defined($datapos) ) {
      $ret = GetDataRecord( $db, $keyptr, $dataptr, $datapos );
      if ( $ret == TRUE ) {
         flock( $$db{btree}, LOCK_UN );
         return "";
      }
   }
}

[download]

What's with == TRUE? Perl subs don't tend to define what true value they return on success. 

$$keyptr = $$db{CurrentKey} = $SavSubtree[$curuser][$$db{RSubtreeno}];

if ( defined($$keyptr) ) {
   my $datapos = $RSubtree{$curuser}{$$keyptr};
   if ( defined($datapos) ) {
      if ( GetDataRecord( $db, $keyptr, $dataptr, $datapos ) ) {
         flock( $$db{btree}, LOCK_UN );
         return "";
      }
   }
}

[download]

In reply to Re: How to eliminate warning message on hash value? by ikegami
in thread How to eliminate warning message on hash value? by flexvault

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