OPatch failed with error code 73 in oracle database 11.2.0.4

OPatch failed with error code 73  in oracle database
 found the issue with patch version and  installed the recent patch and it was successful


$ /app/oracle/product/11.2.0.4/OPatch/opatch  apply
Oracle Interim Patch Installer version 11.2.0.3.4
Copyright (c) 2012, Oracle Corporation.  All rights reserved.


Oracle Home       : /app/oracle/product/11.2.0.4
Central Inventory : /appgrid/oracle/oraInventory
   from           : /app/oracle/product/11.2.0.4/oraInst.loc
OPatch version    : 11.2.0.3.4
OUI version       : 11.2.0.4.0
Log file location : /app/oracle/product/11.2.0.4/cfgtoollogs/opatch/opatch2017-09-29_12-18-17PM_1.log

Verifying environment and performing prerequisite checks...
Prerequisite check "CheckMinimumOPatchVersion" failed.

OPatch failed with error code 73

Solution:
install the recent Opatch version

/app/oradata/cvcdcp.export/11204/OPatch/opatch lsinventory
Oracle Interim Patch Installer version 11.2.0.3.16
Copyright (c) 2017, Oracle Corporation.  All rights reserved.


Oracle Home       : /app/oracle/product/11.2.0.4
Central Inventory : /appgrid/oracle/oraInventory
   from           : /app/oracle/product/11.2.0.4/oraInst.loc
OPatch version    : 11.2.0.3.16
OUI version       : 11.2.0.4.0
Log file location : /app/oracle/product/11.2.0.4/cfgtoollogs/opatch/opatch2017-09-29_12-21-55PM_1.log

Lsinventory Output file location : /app/oracle/product/11.2.0.4/cfgtoollogs/opatch/lsinv/lsinventory2017-09-29_12-21-55PM.txt

--------------------------------------------------------------------------------
Local Machine Information::
Hostname: (server_name)
ARU platform id: 212
ARU platform description:: IBM_AIX

Installed Top-level Products (1):

Oracle Database 11g                                                  11.2.0.4.0
There are 1 products installed in this Oracle Home.


There are no Interim patches installed in this Oracle Home.


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

OPatch succeeded.