c# - Error Prompt modifying cells using EpPlus -

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i used code below allow me modify cell [j10] using epplus] modify code work sucessfully when try open excel file prompted error we found problem content in 'test.xlsx'. want try recover as can? if trust source of workbook, click yes. may ask how go past error

fileinfo newfile = new fileinfo(filelocation);  excelpackage pck = new excelpackage(newfile); //add content sheet var ws = pck.workbook.worksheets.firstordefault();  //headers ws.cells["j10"].value = "test tis";  pck.save(); system.diagnostics.process.start(filelocation);


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