Error:

List of Homes on this system:

  Home name= OraDb11g_home1, Location= "/opt/oracle/products/11.2.0"
LsInventorySession failed: RawInventory gets null OracleHomeInfo

OPatch failed with error code 73

Solution:

Switch to ORACLE_HOME directory and add to oraInventory:

% cs $ORACLE_HOME/oui/bin

% ./attachHome.sh (Linux) execute attachHome.cmd (Windows)