SAP Message CACSFLATTD028 - Calculation date &1 is before start date &2 of agreement &3

Diagnosis
The current calculation date &V1& is before the start date &V2& ofindividual flat-rate agreement &V3&.

System Response
No flat rates can be calculated for thisperiod.

Procedure
Check the individual flat-rate agreement &V3& of the commissioncontract.