Unknown RAT environment variable ['RAT_DISABLE_STALENESS_VALIDATION'] found.

tfactl 18.4.1 run orachk failure

on redhat 6.7

# /oracle/app/11.2.0/grid/bin/tfactl status

.-------------------------------------------------------------------------------------------------.

| Host      | Status of TFA | PID   | Port | Version    | Build ID             | Inventory Status |

+-----------+---------------+-------+------+------------+----------------------+------------------+

| cyraca1dr | RUNNING       | 32678 | 5000 | 18.4.1.0.0 | 18410020181202201219 | COMPLETE         |

'-----------+---------------+-------+------+------------+----------------------+------------------'

[root@cyraca1dr ~]#

[root@cyraca1dr ~]# /oracle/app/11.2.0/grid/bin/tfactl orachk -debug

Using Orachk : /oracle/app/11.2.0/grid/tfa/cyraca1dr/tfa_home/ext/orachk/orachk

Running orachk

----------------------------------------------------------

PATH                             : /oracle/app/11.2.0/grid/tfa/cyraca1dr/tfa_home/ext/orachk/

VERSION                          : 18.4.0_20181129

COLLECTIONS DATA LOCATION        : /oracle/app/grid/tfa/repository/suptools/cyraca1dr/orachk/root

----------------------------------------------------------

Debug output file is /oracle/app/grid/tfa/repository/suptools/cyraca1dr/orachk/root/orachk_debug_120618_143240.log