00:51:58 Load MergeBook1 from Excel2007 file
Call time to read Mergebook1 was 0.0067 seconds
00:51:58 Current memory usage: 1.25 MB
00:51:58 Load MergeBook2 from Excel2007 file
Call time to read Mergebook2 was 0.0034 seconds
00:51:58 Current memory usage: 1.5 MB
00:51:58 Write to Excel2007 format

Fatal error: Uncaught exception 'PHPExcel_Writer_Exception' with message 'Could not close zip file /var/www/html/PHPExcel/Examples/43mergeWorkbooks.xlsx.' in /var/www/html/PHPExcel/Classes/PHPExcel/Writer/Excel2007.php:389 Stack trace: #0 /var/www/html/PHPExcel/Examples/43mergeWorkbooks.php(75): PHPExcel_Writer_Excel2007->save('/var/www/html/P...') #1 {main} thrown in /var/www/html/PHPExcel/Classes/PHPExcel/Writer/Excel2007.php on line 389