requested number of global buffers (<num>) is more than USER
  LIMIT (<num>)

  Explanation:  The user has requested more global buffers than
  are allowed for a single user.

  User Action:  Either reduce the number of requested global
  buffers or increase the number of global buffers that a user may
  allocate.  See documentation for descriptions of USER LIMIT
  clause used when creating and/or opening a database.