SAP Message BRAIN446 - Variable &1 is used for two different characteristics

Diagnosis
The variable &V1& with replacement from the result of query &V2& is usedfor the characteristics &V3& and &V4&. This is not permitted.

System Response
The query cannot be generated.

Procedure
Create two different variables. You can use the same query &V2& in bothvariables.
Note, however, that it is not possible with one or even with two queryvariables to describe a set of characteristic combinations and to passit on to an evaluation query. It is only possible to display Cartesianproduct quantities.