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Hi Carl,
Please open the file koolreport/excel/ExportHandler.php
and replace the following line:
$spreadsheet->addSheet($chartDataSheet);
with these:
$spreadsheet->addSheet($chartDataSheet);
$chartDataSheet->setSheetState(ps\Worksheet\Worksheet::SHEETSTATE_HIDDEN);
We will consider adding this as an option in the next releases of Excel
package. Thanks!
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