LsInventorySession failed: OracleHomeInventory::load() gets null oracleHomeInfo

I faced with that error message while I was trying to apply 10.2.0.4 patch on AIX 6.1 Here is the my steps: 1. Error  Message: [oracle@test]</u01/app/oracle/product/10.2.0/OPatch>opatch lsinventory Invoking OPatch 10.2.0.3.0 Oracle interim Patch Installer version 10.2.0.3.0 Copyright (c) 2005, Oracle Corporation. All rights reserved.. Oracle Home : /u01/app/oracle/product/10.2.0 Central Inventory : /u01/app/oracle/oraInventory from : /etc/oraInst.loc Continue reading