Database Creator <str> is not defined as an user - IMPORT may
  fail

  Explanation:  The database creator does not have a profile
  entry.  It is suggested that the database creator be defined.
  One can do this by specifying the CREATE USER statement.

  User Action:  This is a warning that the named user should be
  defined.  It may be advisable to perform a CREATE USER for the
  database creator and then export the database.  If not, the
  subsequent IMPORT may fail.