Diagnosis
Billing type &V1& assigned to order type &V2& does not exist. Thereason is an incorrect assignment of billing type &V1& fororder-related billing within order type &V2&.

System Response
Order type &V2& cannot be assigned.

Procedure
Make sure, order type &V2& is checked in Customizing. A valid entrymust exist in the field order-related billing type.
If necessary, select a different order type.