SAP Message R7508 - Ref. characteristic &1 is not allowed for exception aggregation &2

Diagnosis The exception aggregations 'AV1' or 'AV2', weighted according to days orworking days of the factory calendar, can only be calculated for(complete) time characteristics (for example, 0FISCPPER, 0CALMONTH) or acharacteristic of type #date#. With a characteristic of type #date#, AV1agrees with exception aggregation AVG. Procedure Enter a valid reference characteristic for &V3&. If this message appearswhile checking or running a query, check the calculated key figure &V3&.