Problem creating an A/P Invoice

Question

Hello, SAP experts:
I have a customer with the following situation:
He had created a down payment invoice for a vendor. Later, after the negotiations with the vendor ended, it turned out that the negotiated unit price for the purchased items was a smaller amount than the unit price in the down payment invoice, so the total amount in the down payment invoice was bigger than the total amount in the final invoice.
Consequently, he tried to create an A/P Invoice drawing only the necessary amount from the down payment, so the total amount in that invoice turned out to be zero. He has authorizations to create purchasing documents with a zero amount. But when he clicks in OK, the following error message appears and the invoice is not created: "Document total value must be zero or greater than zero".
He then tries to create the invoice drawing a lesser amount from the down payment, so the total amount in that invoice turns out to be $1USD. But then, a different error message appears: u201CEnter valid currency, 82120000 [Message 173-57u201D. This message appears despite the fact that the currency of the G/L Accounts for the inventory and the vendor are set as u201CAll currenciesu201D.
What could be causing these issues?

Answer 1

Hi Leonardo,
Is the downpayment invoice paid through Outgoing payment.
1. If the down payment invoice is paid, you can cancel the payment this  will reopen the down payment invoice . The Sales order / downpayment invoice correct unit price can be update and the payment can be executed once again.
2. After cancelling the payment you can either copy the downpayment invoice to the AR Credit note and create a invoice directly.
Hope this helps.
Regards,
Rakesh N