Hi,
Where do you have these worksheets saved? On the computer or on OneDrive.
What is the Office build installed on the computer?
You may repair Office from the control panel and check.
https://support.office.com/en-US/Article/Repair-an-Office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b
Hope this information helps you. Please let us know if you need additional information.
Thank you.
Thank you @ Rasquinha. I have Office 2016 on my Mac. Excel sheet looks ok when Reinstall it, but, the moment I do a cell or a sheet reference these pop out. Tried 3 times to reinstall my excel - no luck. I have learnt to live with it - however irritating it
is.