These are the three reasons for the revenue account code combination being incomplete with the Department segment left blank. The salesperson is not required on the transaction and is left blank, so the system cannot derive the Department segment from the salesperson reference accounts. The revenue reference accounts were entered for all salespersons, so the system cannot use the default revenue account from the transaction type. The no sales credit salesperson has no reference accounts, so the system cannot use the default revenue account from the no sales credit salesperson. Verified [How You Define AutoAccounting - Oracle]