Microsoft Excel is an important tool for many people in their academic and professional endeavors. One common challenge that users face is encountering the error ...

If you’ve tried to open an Excel file and been met with the dreaded extension not valid error, you probably have a corrupt workbook in your hands. It is common to get the common Excel xls and xlsx ...

Whenever I try to export to XLS or XLSX, Excel cannot open the file. Exporting via CSV or HTML does work. I even deleted all the data from the export, and exporting an empty sheet still does not work.

Hamza is a certified Technical Support Engineer. The ‘Excel Cannot Open the File’ error usually occurs when attempting to open an older Excel file with a newer ...

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