LsInventorySession failed: Unable to create patchObject

Problem :

oraesev1@tsgsd4903 $ ./opatch lsinventory
Invoking OPatch 10.2.0.5.1

Oracle Interim Patch Installer version 10.2.0.5.1
Copyright (c) 2010, Oracle Corporation. All rights reserved.


Oracle Home : /erpesev1/oracle/10.2.0
Central Inventory : /erpesev1/oracle/10.2.0/oraInventory
from : /var/opt/oracle/oraInst.loc
OPatch version : 10.2.0.5.1
OUI version : 10.2.0.5.0
OUI location : /erpesev1/oracle/10.2.0/oui
Log file location : /erpesev1/oracle/10.2.0/cfgtoollogs/opatch/opatch2012-03-26_04-03-06AM.log

Patch history file: /erpesev1/oracle/10.2.0/cfgtoollogs/opatch/opatch_history.txt



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

LsInventorySession failed: Unable to create patchObject

OPatch failed with error code 73


Solution

enable opatch debug :

export OPATCH_DEBUG='TRUE'
opatch lsinventory

PatchObject(oracleHomePath,patchID)
PatchObject::PatchObject looks for the actions file /erpesev1/oracle/10.2.0/inventory/oneoffs/6708377/etc/config/actions.xml
PatchObject::PatchObject looks for the inventory file /erpesev1/oracle/10.2.0/inventory/oneoffs/6708377/etc/config/inventory.xml
PatchObject::PatchObject now looks for the actions file /erpesev1/oracle/10.2.0/inventory/oneoffs/6708377/etc/config/actions
PatchObject::PatchObject now looks for the inventory file /erpesev1/oracle/10.2.0/inventory/oneoffs/6708377/etc/config/inventory
Loading the information from inventory/filemap.


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

Directories under inventory/oneoffs are missing

1) If you are cloning the directories must have been missed. Bring the directories from source
2) You can download the patches and copy the etc/config directory from the patch to oneoff
3) Not recommended : You can remove the ONEOFF entries from $ORACLE_HOME/inventory/ContentsXML/comps.xml file.
4) Rebuild the home (Reisntall and apply latest CPU)