SAP Message WTADDI_APPL023 - Procedure for additionals &1 is not intended for vendor &2

Diagnosis
In Customizing for procedurefor additional &V1&, it has been defined that an additional is onlyto be taken into consideration is the method is assigned to a vendor.

System_response
Method &V1& has not been assigned to vendor &V2& for purchasing
organization &V3& and vendor sub-range &V4&. Therefore, the additionalis not taken into consideration.

Procedure
Maintain the assignment of procedure foradditional and vendor.
After having done this, you must process the current document oncemore.