Hi Jeanne,

Just to add to Student's response, in order to prevent the observed
behaviour, when events are disabled in the code, it is advisable to
re-enable events in an error handler, e.g:

'=============
Private Sub Worksheet_SelectionChange(ByVal Target As Range)

On Error GoTo XIT
Application.EnableEvents = False

'your code

XIT:
Application.EnableEvents = True
End Sub
'<<=============



---
Regards,
Norman


"Jeanne Conroy" wrote in message
...
Hi Group:

I created a macro to pop up a message box under certain conditions using
the
Workbook_Change property of a worksheet. However sometimes it seems to
stop
working. What could cause this?

JJ