Please try

if(defined $data){
    $exportLibs{$scopeName} = $data; 
}
[download]

Hope this is what you really want.

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Update: If your intention is to join more than one $data array for the same $scopeName, you'd need:

if(defined $data){
    push @{ $exportLibs{$scopeName} } = @$data; 
}
[download]