Outlook email. Hello there Ahunn, Did this problem only show up in Excel? Where do you shop the data files? On regional personal computer or network? I suggest you try out this technique and check out if it works fine:. Open a brand-new Excel file.

'Excel cannot open the file 'filename.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.' When you work in a file, Microsoft Excel saves the file with a temporary file name and places this file in the same folder as the original file. When you save your file, the original file is then deleted and the temporary file is renamed with the original file name. Nov 05, 2015  From the computer (1) I was working with the file I couldn't save, I went to File/Share and emailed it to myself. Got the email on another computer (2), saved the file to Dropbox. Went back to Computer (1), closed Excel completely. Excel for Office 365 for Mac Excel 2019 for Mac Excel 2016 for Mac Excel for Mac 2011 More. Less If you routinely share files with someone using an earlier version of Excel, set Excel to save your workbooks to a more convenient format.

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Select the Excel file you desire to Open up. Consider to save the file. After that I recommend you try to uninstall Workplace totally and after that reinstall Office. About how to uninstall Workplace completely, make sure you pertain to this post: If this concern still exists, please consider to create a fresh accounts of Macintosh and check out if it works great in brand-new account of MAC. Install 64 bit microsoft office for mac.

Any updates please allow me understand, I'm pleased to help and adhere to up your response. Regards, Emi Zhang TechNet Group Support Make sure you mark the answer as an response if you find it will be helpful. If you possess responses for TechNet Assistance, contact. Hello there Ahunn, Did this issue only appear in Excel? Where do you shop the files?

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On regional computer or system? I recommend you attempt this technique and check out if it works fine:. Open up a brand-new Excel file. Choose the Excel file you would like to Open.

Consider to save the file. Then I suggest you consider to uninstall Office completely and after that reinstall Office. About how to uninstall Workplace completely, please direct to this article: If this issue still exists, please consider to develop a new accounts of Macintosh and examine if it functions great in brand-new accounts of MAC.

Any up-dates please allow me understand, I'michael glad to help and follow up your reply. Regards, Emi Zhang TechNet Group Support Make sure you indicate the answer as an reply if you find it is helpful. If you possess opinions for TechNet Support, contact.