NullReferenceException in vb.net

Try
            NowTime = DateTime.Now
If IsValidShutdown Then
                tblRawTesterShutdown = objDAL.GetRawTesterShutdown(StartTime, NowTime)
asdasdIf tblRawTesterShutdown.Rows.Count > 0 Then
                    For Each RowItem As DataRow In tblRawTesterShutdown.Rows
                        objShutdownReport = New ShutdownReportENT
                        With objShutdownReport
                            .ShutdownType = _ShutdownType
                            .TesterID = LineNo                          
                            .E_Code = RowItem.Item("E_FIELD").ToString.Trim
                            .F_Code = RowItem.Item("F_FIELD").ToString.Trim
                            .G_Code = RowItem.Item("G_FIELD").ToString.Trim
                            .Status = RowItem.Item("HSA_STATUS").ToString.Trim
                            .Family = RowItem.Item("FAMILY").ToString.Trim
                            .Count = CInt(RowItem.Item("COUNTOFLINENO"))
                            .StartTime = StartTime
                            .Timestamp = NowTime                           
                            .CACHE_FAMILY = RowItem.Item("CACHE_FAMILY").ToString.Trim                           
                            If Family = Nothing Then
                                Family = "'" & .Family & "'"
                            Else
                                If Family.IndexOf(.Family) = -1 Then
                                    Family = Family & ",'" & .Family & "'"
                                End If
                            End If
                        End With

                        objDAL.InsertShutdownReport(objShutdownReport)
                    Next
                Else
                    Return False
        End If
 Catch ex As Exception
            Throw New Exception("Shutdown: " & ex.Message)
        Finally
        End Try
        Return False