Fatal error: Uncaught exception 'PHPExcel_Calculation_Exception' with message 'W

[sinat_28248601]

Fatal error: Uncaught exception 'PHPExcel_Calculation_Exception' with message 'Worksheet!D525 -> Formula Error: An unexpected error occured' in /home/gengxiankun/code/sdxhyg/core/framework/vendor/excel/Classes/PHPExcel/Cell.php:300
Stack trace:
#0 /home/gengxiankun/code/sdxhyg/core/framework/vendor/excel/Classes/PHPExcel/Writer/Excel5/Worksheet.php(460): PHPExcel_Cell->getCalculatedValue()
#1 /home/gengxiankun/code/sdxhyg/core/framework/vendor/excel/Classes/PHPExcel/Writer/Excel5.php(187): PHPExcel_Writer_Excel5_Worksheet->close()
#2 /home/gengxiankun/code/sdxhyg/shop/control/store_order.php(1110): PHPExcel_Writer_Excel5->save('php://output')
#3 /home/gengxiankun/code/sdxhyg/shop/control/store_order.php(1074): store_orderControl->output(Object(PHPExcel_Writer_Excel5), '2016-04-13 17:2...')
#4 /home/gengxiankun/code/sdxhyg/shop/control/store_order.php(611): store_orderControl->_studentexcel(Array, NULL)
#5 /home/gengxiankun/code/sdxhyg/shop/control/store_order.php(594): store_orderControl->_excel(Array, NULL)
#6 /home/geng in /home/gengxiankun/code/sdxhyg/core/framework/vendor/excel/Classes/PHPExcel/Cell.php on line 300
以上是我导出excel是在导出的excel里报的全部错误，完全没有头绪，想问问有大神知道这种情况吗？

[sinat_28248601]

自己找到了原因，d525的一个用户名为”==”报错了