[INS-32050] Install user (grid) does not have sufficient access permissions for the given central in

Hi All,

We are  having  2 node  rac on 12.1.0.2  on  RHEL 7.6

We are planning to upgrade to 19c . 

Created the following directories with the below permission

[root@Node2  ~]$ mkdir -p /oracle/app/19.3.0/grid

[root@Node2  ~]$ chown -R grid:oinstall  /oracle/app/19.3.0/

[root@Node2  ~]$ chmod -R 775 /oracle/app/19.3.0/grid

[root@Node2  ~]$ chmod -R 775 /oracle/app/19.3.0

While doing the dryrun from 19.3    got the below error .

./gridSetup.sh -dryRunForUpgrade  -applyPSU  /oracle/app/software/GRID_19.3/Grid_19.3/30501910

[INS-32050] Install user (grid) does not have sufficient access permissions for the given central inventory.

Cause - User does not have read or write permissions for /oracle/app/oraInventory/locks under the central inventory.