Code Isn't Triggering With Worksheet Change Event

[Ark68]

I am having problems with this code ...

Private Sub Worksheet_Change(ByVal Target As Range)
    If Target.Address = ws_form.Range("X" & rwend + 11) Then
        Stop
        Dim unx As Integer
        unx = CInt(Target.Value)
        w_unx = unx / 0.125
        If Int(w_unx) <> w_unx Then
            MsgBox "Invalid quantity of materials entered." & Chr(13) & "Values may only be increments of 0.125 (1/4 hopper) tonne.", vbInformation, "INVALID DATA"
            Application.EnableEvents = False
            ws_form.Range("W37") = ""
            Application.EnableEvents = True
        End If
    End If
End Sub

This code is at the worksheet level. When the user enters a value, it's supposed to trigger the code.
In my testing, rwend =29.
The cell the user is typing in is X40 (rwend + 11 = 29+11 = 40). I put a stop in the code so that I know if the code is reached, but after the user enters the number, the code doesn't fire. Perhaps 'change' isn't the right action for this event, in which case my question would be what would be best?

 

[Jaafar Tribak]

Maybe:
If Target.Address = ws_form.Range("X" & rwend + 11).Address Then

 

[Ark68]

Thank you Jaafar for your support. Unfortunately, the line itself is erroneous. No error code, but the line bonks and turns red.

 

[Ark68]

My bad. A typo ... working wonderfully! Thank you.