To troubleshoot CSV file validation:
Error messages appear in the Problems area of the Import page. The error messages identify problems that are found in the CSV file during validation.
You can save the list of errors to a CSV file.
Each error includes the line number where the error occurs in the CSV file.
See the comments at the top of an export file to help you correct errors. When the file has been corrected, validate the file again.
To troubleshoot CSV file import:
Warning and error messages appear in the Problems areas of the Import page to alert you issues found during import.
If you see an error, the information in that line of your file was not imported.
Duplicate entries are not imported and do not appear in the Audit Trail.