KenReay: The Master/child links are there. The forms work for existing records.
rollie@bwsys: I guess I do need a sample...the following is the code that I came up with when adding the add record button to the main form and trying to add your code. The underlying tables have a one to one relationship on the Product_Number field.
I get an error saying "You tried to assign the Null value to a variable that is not a Variant data type."
Private Sub Add_Part_Number_Click()
On Error GoTo Err_Add_Part_Number_Click
DoCmd.GoToRecord , , acNewRec
Dim rs As DAO.Recordset
Set rs = CurrentDb.OpenRecordset("dbo_08_Product_Numbers"
rs.AddNew
rs("Product_Number"

= Me.Product_Number
rs.Update
rs.Close
Exit_Add_Part_Number_Click:
Exit Sub
Err_Add_Part_Number_Click:
MsgBox Err.Description
Resume Exit_Add_Part_Number_Click
End Sub