outlook crashing constantly with this error "Database Daemon Fatal Error" it is very frustrating. how do i fix this

Since migration from Entourage to Outlook with Mountain Lion as O/S I was outlook was crashing with the message: "Database Daemon Fatal Error" After various patches to Outlook and O/S  the frequency of crashes reduced substantially.  The frequency has increased dramatically when i migrated to Lion O/S.  How can i fix this as its extremely frustrating