run time error 2487

[prabhus]

i used the below code in my subform and working fine. but when i link this subform to my navigation form, i am getting runtime error 2487 while closing the navigation form.

how to fix this?

Private Sub Form_Close()
'Provide the user with the option to save/undo
'changes made to the record in the form

If MsgBox("Changes have been made to this record." _
& vbCrLf & vbCrLf & "Do you want to save these changes?" _
, vbYesNo, "Changes Made...") = vbYes Then
DoCmd.Save
Else
DoCmd.RunCommand acCmdUndo
End If
End Sub

 

[CJ_London]

what is runtime error 2487? a description would help

Also, on what line of the vba code does the error occur?