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.