Try each of the following steps in order until the issue is resolved:
- Ensure the information to be imported or updated is in the import file
- Open the import file.
- Add the information to be updated on the records. Save and close the import file.
- Remove any symbols, such as squares or other shapes, from the import file. Save and close the file.
- Perform the import rather than the validation
- In Import, open the import parameters.
- On the General tab, un-mark the Validate data only or Validate [record type] data without performing an import checkbox.
- Click Import Now or Update Now.