SAP Message REXAFC016 - Paying company code cannot be determined for partner &1

Diagnosis
In order to check the payment data, the system needs the paying companycode. The paying company code cannot be determined at the moment. Onereason could be that a contract account was not yet assigned to apartner, who is assigned to the posting term. Another reason could bethat the contract account was not yet created.

System Response
A check of the payment data is currently not possible.

Procedure
Enter the missing data. If the contract account is createdautomatically, this message should no longer appear once the contract is
saved or activated.