This is driving me totally insane. Can anyone tell me what I am doing wrong here.
Two datasets (AttainmentTotal,B) attached.
SSRS tablix with expression in textbox as below
=Lookup(Fields!MonthNm.Value, Fields!MonthNm.Value,
Fields!AttainmentTotal.Value, "sp_NonData_Attainment_Total")
Last column in design returns blank cell as though there is no match.