Diagnosis
No debit memo notification was found for business partner &V1&.

System Response
In the settings for the company code, it was specified thatnotifications can be required for debit memos. The payment method to beused in the present instance (derived from the item or the account/contract) is either defined as of the type "notification", or no paymentmethod was defined. It is therefore not possible to make the payment forthe amount due.
In the same way as above, you can also specify that the outgoing paymentof credits has to be notified with a specific payment method. If thispayment method is entered in the item or as the only payment method inthe account/contract, the validity of the notification is also checked.If an outgoing payment is to occur without notification, a paymentmethod that is not of the type "notification", has to be entered in theitem or as the only outgoing payment method in the account/contract.

Procedure
To create debit memo notifications, start transaction FPDDAX.