Diagnosis
In the self-billing document, a delivery item was displayed for which noinitial billing document exists. The billing document does not existbecause the item with material &V2& in delivery &V1& is not relevant forbilling.
This is an example of a delivery item to an order for which order-related billing takes place (for example, returns), or a delivery itemthat is generally not relevant for billing.
The self-billing process only supports transactions for which delivery-related billing takes place. Transactions that are not relevant forbilling, or transactions for which order-related billing takes place, isnot supported.

System Response
It is not possible to process this item in the processing step due tothe existing message.

Procedure
Deactivate the item so that the processing step ignores this.
You have to then manually process the self-billing document for thisitem in Accounting.