If $Return_ptr and $Column1 are pointers, you have to dereference them:
$Result:= $Column1->{ $Return_ptr->{$Item} }
For better clarity I would extract $Return_ptr->{$Item}
$index_col:= $Return_ptr->{$Item}
$Result:= $Column1->{ $index_col }
HTH
Regards
Lutz
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