SAP Message 6A409 - Internal error: variable &1 (name &2) unknown

Diagnosis
The system does not recognize variable &V1& (described as &V2& inCustomizing).

System Response
Variable &V1& cannot be interpreted.

Procedure
This is due to a programming error. The variable is indicated in tableTIVO1 but not in corresponding structure RFVIMASP01.
Contact SAP regarding this error.