how to determine what spu, psu to apply after installing a fresh 11.2.0.3 database

i am trying to test applying the SPU july 2013 patch on my test environment (a fresh installation of oracle 11gr2 )
i bum into the below ERROR:

$ opatch napply -skip_subset -skip_duplicate
Oracle Interim Patch Installer version 11.2.0.3.4
Copyright (c) 2012, Oracle Corporation.  All rights reserved.


Oracle Home       : /oracle/u01/app/oracle/product/11.2.0
Central Inventory : /oracle/u01/app/oraInventory
   from           : /oracle/u01/app/oracle/product/11.2.0/oraInst.loc
OPatch version    : 11.2.0.3.4
OUI version       : 11.2.0.3.0
Log file location : /oracle/u01/app/oracle/product/11.2.0/cfgtoollogs/opatch/opatch2013-08-02_17-32-38PM_1.log

Verifying environment and performing prerequisite checks...
UtilSession failed: NApply was not able to get the list of patches to apply.