We get this error message when posting the incoming payment. The customer pays only partial, so we try to create a residual item (transaction F-28).
The billing document is created by a debit memo request coming out of a service order. The billing document and DMR has reference to a contract with customer order controlling.
Before that I can see another contract in the flow, but no reference as a controlling assignment to that contract.
What we're wondering, is why F-28 wants to do an account assignment as a balance account is involved and no CO cost element.
What to do ?