VMS Help PASCAL, Input Output, General, OPEN, Error Recovery  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The 'error_recovery' specifies the  action  the  program  should
  take  if  an  error  occurs during execution of the routine.  By
  default, after the first error, the error message is printed and
  execution is stopped.