  TYPE
    iot$io_error = (ioc$no_error, ioc$allocate_file_space, ioc$media_error, ioc$unrecovered_error,
      ioc$unrecovered_error_unit_down, ioc$server_allocation_error, ioc$server_has_terminated,
      ioc$error_on_init, ioc$unit_down_on_init);
