Opatch: LsInventorySession failed: OracleHomeInventory gets null oracleHomeInfo : OPatch failed with error code 73

Problem

While running opatch lsinventory, command fails with the below error:

Inventory load failed... OPatch cannot load inventory for the given Oracle Home.

Possible causes are:

   Oracle Home dir. path does not exist in Central Inventory

   Oracle Home is a symbolic link

   Oracle Home inventory is corrupted

LsInventorySession failed: OracleHomeInventory gets null oracleHomeInfo

OPatch failed with error code 73

Solution

Attach the Oracle Home to the Central Inventory:

$ cd $ORACLE_HOME/oui/bin 

$ ./attachHome.sh

Now check, command should work fine.

$ORACLE_HOME/OPatch/opatch lsinventory