Hi @David Fowler ,
First you could repair an office application.
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After latest update, one excel worksheet won't open. Other worksheets open
Hi @David Fowler ,
First you could repair an office application.
On option is try to repair the workbook, if it's may broken.
https://support.microsoft.com/en-us/office/repair-a-corrupted-workbook-153a45f4-6cab-44b1-93ca-801ddcd4ea53
Thanks for your sharing. I am glad that you can open and download the file from OneDrive.
If a particular workbook cannot be opened, it may be the workbook is corrupted, we can refer to OlafHelper-2800's suggestion to repair this file.
As you said, it is recommended to upload important files to OneDrive as a backup in case.
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