I have been working through the MSAccess Expert series.  After reviewing some of the material and working through the database I have encounter a problem that I have no idea where it came from.   When going into Design view for the CustomerListF or even the Main Menu Form everything looks ok until I try and close.  When closing the form or trying to switch to form view the following error message appears, "The Switchboard Manager was unable to find a valid switchboard in this database.  Would you like to create one?"   I have not made any changes to the particular form.  However, I did add the Call Back Button to the Main Menu Form.  How do I fix this problem.  I am not trying to use the Switchboard Manager.

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Reply from Alex Hedley:

I thought the switchboard manager was removed from access back in 2007.
Was this an old mdb that you've converted?
Did you create one?

Check this MS Article.