If(GetVDSInfo.List.CurrentRowNumber=0 or (GetVDSInfo.List.Current.VDSDetails.Material<>(GetVDSInfo.List[GetVDSInfo.List.CurrentRowNumber-1].VDSDetails.Material)),True,False) Where GetVDSInfo is the list of editable table. And if the material name is same as earlier row material then its visibility is false. Hope this helps, if someone is looking for the same