The #### error is one of the most common errors when using Excel, and it’s easy to fix. Excel prints this error message when the width of a column is not wide enough to display all the characters within that cell. This error can also occur when Excel displays a negative time and date.

1. Investigate possible issues with files in Startup folders.
2. Install the latest updates.
3. Check to make sure Excel is not in use by another process.
4. Investigate Excel file details and contents.
5. Check whether your file is being generated by a third party.