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   $worksheetout->write_col( 0, 0, @$indata );

   # Should be:
   $worksheetout->write_col( 0, 0, $indata );

    Not an array ref in call to write_col() at /tmp/pm876841.pl line 4
+1

    $worksheetout->write_col( 1, 0, @$sqldata );