database is not being used, or must be manually opened first

  Explanation:  You attempted to close  a  database  that  is  not
  open, or you attempted to access a closed database that requires
  manual open.

  User Action:  There is no need to close the  database  -  it  is
  already  closed.   If  you  are  attempting  to  access a closed
  database that requires manual open, open the database first.