PHP Excel多页导出多次导出||致命错误：未捕获的异常'PHPExcel_Exception'

I am using PHP Excel, for exporting datas in 2 sheets. Each worksheet should have different structure and different. Here I have the code , that I try to use to generate 2 sheets with different names but same datas and structure. Here is the code that I use:I am using PHP Excel, for exporting datas in 2