Solution 7: Open MS Excel in Safe Mode Solving the “ Excel cannot open because the file format is not valid ” problem can sometimes be as simple as booting your computer into Safe Mode . This is ...

Key notes A file’s format and extension not matching means the file was saved in a different format than its extension. Problems can occur when trying to open the file if the program doesn’t recognize ...

First try to rename file. Go to tools, folder options, file types and check have you .xlsx extension. If not then rename the file .xlsx to .xls Second try to use excel command in file menu – Open and ...

In such cases there’s a mismatch in file formats which causes the file not to open. It is also possible that the file extension is not valid because it is not compatible with your version of Excel or ...

The ‘Excel Cannot Open the File’ error usually occurs when attempting to open an older Excel file with a newer version of the software. This problem frequently arises if the file has been renamed with ...

Describe your issue (incl. Traceback!) After installing the add-in using "xlwings addin install", I am met with the message box "Excel cannot open the file 'xlwings.xlam' because the file format or ...

Open File Explorer and click on the View tab at the top. Make sure the box for File Name Extensions is checked. Once file name extensions are enabled, navigate to where the Excel file is stored. Right ...