When there is no connection to the StrataFrame database the BOM will show the message with Event ID: 2121 and give the option to "Configure" the connection.When clicking the "Configure" button the BOM form is opened and try to populate the projects, then throw and .Net SqlClient exception.
What is expected is to get the Connection Wizard to fix the problem and then continue loading the projects.
You can easily duplicate this by changing the connection to the SF database and then try to open the BOM.