In Parameters Tab of Data Transform Rule Define Parameters of Type Integers CounterCRSP Data Type = Integer Default Value = 0 CurrentCountCRSP Data Type = Integer Default Value = Not Required Now In Definition Tab of Data Transform Rule 1) Set Param.CounterCRSP equal to Param.CounterCRSP+1 2) Set Param.CurrentCountCRSP equal to Param.CounterCRSP We can use above logic inside Flow where we are looping one or multiple assignments based on conditions. Thanks,