Recreating OraInventory(Corrupted/Lost) for already existing Oracle Home

Registering Oracle Home in the Central Inventory:

Symptoms: 

         Exception oracle.sysman.oii.oiil.OiilNativeException: S_OWNER_SYSTEM_EPERM occurred..

          'AttachHome' failed.

           LsInventorySession failed: Oracle Home inventory cannot be loaded.     

           Oracle Home inventory is corrupted.

           OPatch failed with error code 73

Cause:

             ORACLE_HOME is not registered in the Central Inventory.

Solution:

                Take a backup copy of oraInst.loc as oraInst.loc.bak

                Check $cat /etc/oraInst.loc file to know where you want to create OraInventory file.

                Give Read Permissions for all groups to the oraInventory file $chmod 644 oraInventory

                   $cd $ORACLE_HOME/oui/bin    (Go to Oracle Universal Installer)

                    [oravision@test bin]$ ./attachHome.sh

                    Starting Oracle Universal Installer...

                    Checking swap space: must be greater than 500 MB.   Actual 63999 MB    Passed

                   The inventory pointer is located at /etc/oraInst.loc

                   'AttachHome' was successful.

(OR)

               $./runInstaller -silent -attachHome ORACLE_HOME="/u01/oracle/product/12.1.0" ORACLE_HOME_NAME="Ora12CHome"