Phpexcel in Linux environment to export the 500 error resolution method

Originally I exported to XLSX format, using the

$objWriter = Iofactory::createwriter ($objPHPExcel, ' Excel2007 ');

Error, tangled in the development environment and test environment are no problem, placed in the production environment Direct 500 error.

Later I changed to export XLS format,

$objWriter = Iofactory::createwriter ($objPHPExcel, ' Excel5 ');

Problem solved, specifically why to stay empty research under!!!

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