Great question!  

The short answer - it depends on what import type you are using...


Standard Transaction Import - For this import type you will need to delete the previous files that had errors, and reload the corrected file.


Standard Manager Investment Activity Import - Using this import type you can over-write the existing data and do not have to delete the file with errors.  

Bulk Import - Using this import type you can over-write the existing data and do not have to delete the file with errors.


For questions about the Awards Import and Custom Imports, please contact support@fundriver.com