I made my workbook read only so that users cannot select the chart on a
chart sheet. Now when I open my workbook it displays a message:

'Workbook should be opened as read only unless you intend to save changes to
it. Open as read only?'

I put Application.DisplayAlerts = False in the OnOpen code first line but it
wont go away. Does anyone know how to get rid of it ?

Any help much appreciated, kind regards, Mark