Message SAP WU155 - Class & belongs to the class type & not allowed in promotions

Diagnosis
No plant group could be found because the assignment of the class typefor promotion processing was not maintained in Customizing.
Plant groups that are used in promotion processing may only belong tothose class types that are assigned to the plant group application "03"in Customizing.
You should also use the same application key for the allocation tablefunction.

Procedure
Maintain the plant group applications inCustomizing.
INCLUDE ISR_CUSTOMIZING