Cannot init.  external  routine  server  site  executor;  reason
  <num>

  Explanation:  The attempt to create and initialize a server site
  client external routine executor has failed.  This is usually an
  indication of a lack of privileges or quotas, a lack  of  system
  resources,  or  the  inability to establish the necessary client
  environment.   The  reason  value  represents  a  more  specific
  indication of the failure.

  User Action:  For reasons 1 thru 9, check for sufficient quotas.
  For  reasons  10  thru  19,  increase  the value for environment
  variable RDMS$RTX_SHRMEM_PAGE_CNT as required.  For  reasons  20
  thru  29,  make sure the proper images have been installed.  For
  all other reasons, contact your  Oracle  support  representative
  for  assistance.   You  will  need  to provide a script allowing
  reproduction of the problem.