Message SAP WXP505 - Only two break-downs must be assigned to interface &1

Diagnosis
You created interface &V1& for generatingallocation tables. The interface definition mustcontain information about how the material andplant characteristics used for creating items and plantlists for the allocation tables are to be used, and which are definedin manual planning. You want to find theses characteristics in yourinterface using break-downs. Your system hasfound incorrect entries. Only two break-downs can be entered one ofwhich finds the material and the other finds the plant.

System Response
You cannot use allocation &V1& to create an allocation table.

Procedure
Define two break-downs in interface &V1&.