An error message "A number sequence has not been set up for the reference internal invoice in the area Accouns payable" is received when posting a purchase order in the invoice pool. In this case, the customer/the customer's accounting department must enter the order each time and assign a number range group to the order. Only then can the booking be made via the invoice pool. Given the number of invoices, this procedure is very time-consuming, and this workaround is not acceptable for the customer.

Our expectation is that the logic of the invoice pool should also function in the same way as the chronological number range group.