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webtech360Líon na míonna: 4

8 ways to fix Excel Cannot Open Because The File Format Is Not Valid error

2. Select Manage Workbook > Recover Unsaved Workbook . Excel file recovery options 3. From the list of files displayed, open the inaccessible file and save it. Solution 7: Open MS Excel in Safe Mode ...
Windows ReportLíon na míonna: 11

Excel Error Extension Not Valid: 5 Ways to Fix it - Windows Report

With the Excel extension is not valid error, try starting the app in Safe Mode, repair the workbook or open the file in another program.