Hi;
Second time I'm asking this question, and hope someone can suggest a cure.
I'm running a form with a cbo box for data entry. I have 5 other BASICALLY
IDENTICAL cbo's on the form, all of which work fine.
My NotOnList event is as follows:

   ' Add a new policy type by typing a name in
   ' CoPolicy Type  combo box.

   Dim NewCoPolicyType As Integer, TruncateName As Integer, Title As String,
MsgDialog As Integer
   Const MB_OK = 0
   Const MB_YESNO = 4
   Const MB_ICONQUESTIONMARK = 32
   Const MB_ICONEXCLAMATION = 64
   Const MB_DEFBUTTON1 = 0, IDYES = 6, IDNO = 7
   ' Display message box asking if user wants to add a
   ' new insurer.
   Title = "Policy Type Not In List"
   MsgDialog = MB_YESNO + MB_ICONQUESTIONMARK + MB_DEFBUTTON1
   NewCoPolicyType = MsgBox("Do you want to add a new Policy Type?",
MsgDialog, Title)
   
   If NewCoPolicyType = IDYES Then

       '  Open Add Policy form.
       DoCmd.OpenForm FormName:="FPolicyTypeCo", DataMode:=acAdd, WindowMode:
=acDialog, openargs:=NewData
       '  Continue without displaying default error message.
       Response = acDataErrAdded

   End If
End Sub

When THIS PARTICULAR NotInList event fires, I am find that:
1)the cbo is not cleared of the newdata entry as the dialogue form opens (as
it does on all my other cbo's). Note, however, that the openargs ARE properly
carried to the dialogue form.
2)When the dialogue form is closed, my cbo is blank, and I get errmsg of
"item not in list".

Can anyone make any sense of why this is happening on only one of six cbos,
and  any solution you can recommend.
TIA, Richard