object type system.data.datarowview - No Mapping exists... what does that mean??

    Dim weight As Double = CType(TextBox9.Text, Double)  ' lbs
                    Dim tare As Double = CType(TextBox8.Text, Double)  ' lbs
                    Dim samplesize As Integer = ComboBox4.Text  ' #
                    Dim sampleweight As Double = CType(TextBox3.Text, Double) 'oz
 
                    Dim weightozperpeice As Double = sampleweight / samplesize  ' oz
 
 
 
                    Dim boxqty As Integer
 
 
                    Dim counter As Integer = 0
                    Dim boxinsert As Integer = CType(TextBox1.Text, Integer)
 
                    Do Until counter = CType(TextBox1.Text, Integer)
 
                        If counter = boxinsert Then Exit Do
                        counter += 1
 
                        boxqty = (weight - tare) / (weightozperpeice / 16)
 
                        ' to boxes table
                        Sqlinsertboxinfo.Parameters.Clear()
                        Sqlinsertboxinfo.Parameters.AddWithValue("@lognumber", CType(vlognumber, Integer))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@materialnumber", CType(currentmaterialnumber, Integer))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@boxnumber", CType(counter, Integer))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@barcodeidentity", CType(currentmaterialnumber & "-" & counter, String))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@boxqty", CType(boxqty, Integer))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@weight", CType(TextBox9.Text, Decimal))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@tare", CType(TextBox8.Text, Decimal))
 
                        ' to materials table
 
                        Sqlinsertboxinfo.Parameters.AddWithValue("@category", ComboBox1.SelectedValue).ToString()
                        Sqlinsertboxinfo.Parameters.AddWithValue("@type", ComboBox2.SelectedValue).ToString()
                        Sqlinsertboxinfo.Parameters.AddWithValue("@size", ComboBox3.SelectedValue).ToString()
                        Sqlinsertboxinfo.Parameters.AddWithValue("@matimage", matimage).ToString()
                        Sqlinsertboxinfo.Parameters.AddWithValue("@comments", TextBox2.Text).ToString()
                        Sqlinsertboxinfo.Parameters.AddWithValue("@boxesingroup", CType(TextBox1.Text, Integer))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@sampleweight", CType(TextBox3.Text, Double))
                        Sqlinsertboxinfo.Parameters.AddWithValue("@samplesize", CType(ComboBox4.Text, Integer))
 
 
 
                        Dim rowCount1 As Integer
                        Dim previousConnectionState2 As ConnectionState
                        previousConnectionState2 = SqlConnection1.State
                        Try
                            If SqlConnection1.State = ConnectionState.Closed Then
                                SqlConnection1.Open()
                            End If
                            rowCount1 = Sqlinsertboxinfo.ExecuteNonQuery()
 
                        Finally
                            If previousConnectionState2 = ConnectionState.Closed Then
                                SqlConnection1.Close()
                            End If
                        End Try
 
 
                      
 
 
                    Loop

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