Hello, I have used 2 expressions in 2 charts. To calculate the sum of that expression I have tried the following expressions and they are causing following errors: 1.=Sum(If(F=0,Interval(Max(StopTime)-StartTime,'hh:mm:ss.fff'))) //In chart Im getting the correct column wo error Error:Error in expression:Nested aggregation not allowed 2.=Min(If(Fail=1,Interval(Min(FailTS)-StartTS,'hh:mm:ss.fff'))) Error:Error in expression:Nested aggregation not allowed How can we solve it?Any suggestion would be helpful