What's the difference between AutoInvoice exceptions and unprocessed lines?
AutoInvoice import exceptions are invoice and credit memo lines that failed validation during a run of the Import AutoInvoice process. Unprocessed lines are all lines not successfully transferred to the Receivables tables; this includes both AutoInvoice exceptions and unprocessed records with no status.
AutoInvoice import exceptions remain in the AutoInvoice interface tables for review and correction. In the Import Exceptions infotile, click a numbered link in the Number of Exceptions column to open a workbook for these specific error records. After you correct invalid data in these transaction lines, run the Import AutoInvoice process again
Some unprocessed lines are invoice lines that for some reason weren't picked up during AutoInvoice import. You can try running the Import AutoInvoice process again to validate these lines and transfer them to Receivables.
You can also run the Purge AutoInvoice Interface Data process to clear unprocessed lines. Select the applicable business unit and enter Unprocessed in the Status field.