14:55:19 Enable Cell Caching using MemoryGZip method
14:55:19 Create new PHPExcel object
14:55:19 Set properties
14:55:19 Add data
14:55:19 Hide 'Phone' and 'fax' columns
14:55:19 Set outline levels
14:55:19 Freeze panes
14:55:19 Rows to repeat at top
14:55:21 Write to Excel2007 format

Fatal error: Uncaught exception 'PHPExcel_Writer_Exception' with message 'Could not close zip file /var/www/roundstone/vendor/phpoffice/phpexcel/Examples/06largescale-with-cellcaching.xlsx.' in /var/www/roundstone/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel2007.php:399 Stack trace: #0 /var/www/roundstone/vendor/phpoffice/phpexcel/Examples/06largescale-with-cellcaching.php(113): PHPExcel_Writer_Excel2007->save('/var/www/rounds...') #1 {main} thrown in /var/www/roundstone/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel2007.php on line 399