SAP Message BRAIN656 - Could not determine a value for variable & from the authorizations

Diagnosis
The variable must be filled, but no values were found.
Variables can require optional or mandatory input.
Variables that are filled from authorizations and that are used in queri
es by a power user with all authorizations for the correspondingcharacteristic must not be mandatory. These variables must be optional;if they are not optional, it is possible that no values are found evenwhen full authorization (no restriction) is available.

Procedure
Change the input type for the variable to "optional".