09:24:11 Create new PHPExcel object
09:24:11 Set document properties
09:24:11 Add some data
09:24:11 Sum of Range #1 is 23
09:24:11 Sum of Range #2 is 33
09:24:11 Sum of both Ranges is 56
09:24:11 Minimum value in either Range is 3
09:24:11 Maximum value in either Range is 17
09:24:11 Average value of both Ranges is 9.333333333333334
09:24:11 Rename worksheet
09:24:11 Write to Excel2007 format

Fatal error: Uncaught exception 'PHPExcel_Writer_Exception' with message 'Could not close zip file /var/www/ECHANGE/sf2_echange_mcdo/vendor/phpoffice/phpexcel/Examples/03formulas.xlsx.' in /var/www/ECHANGE/sf2_echange_mcdo/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel2007.php:399 Stack trace: #0 /var/www/ECHANGE/sf2_echange_mcdo/vendor/phpoffice/phpexcel/Examples/03formulas.php(119): PHPExcel_Writer_Excel2007->save('/var/www/ECHANG...') #1 {main} thrown in /var/www/ECHANGE/sf2_echange_mcdo/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel2007.php on line 399