# just hang onto the ARRAYref returned from $csv->getline(),
    # unless it doesn't want us to.
    $file2{$id}=$row; 
    $file3{$id}=$row;
...
    # You really did want the 6th column, right?
    my $fields2=$file2{$id}->[5];
    my $fields3=$file3{$id}->[5];