In this post I’ll cover second issues faced during Fusion Application 11.1.3 installation. For First issue related to provisioning.setup.pillars. core.schema.schema. FUSION_RUNTIME.schema click here
[2012-04-05T19:10:55.036+01:00] [runProvisioning-preverify] [ERROR]  [runProvisioning-preverify] [tid: 12] [ecid: 0000JQ3gf3r6ESgvDCsHtC1FVTza000003,0] List of failed Validation in OIM[[ 1. OAM_Validation: Cannot perform OAM Validation as null]]
Issue is than internal connection between OIM and OAM.
OAM Proxy-Server can be configured in one of three modes OPEN, SIMPLE, and CERT. If OAM is running in SIMPLE or CERT mode then clients should also show certificates when connecting to OAM Proxy-Server.
OAM Webgate password and certificates required (when OAM is running on SIMPLE or CERT) to connect are stored in Credential Store of OIM Fusion Middleware (FMW). These passwords and credential are created during OIM/OAM integration idmConfigTool.sh -configOIM (More on idmConfigTool here)
This issue could happen if the WebGate Password or OAM keys are not seeded in to CSF (Credential Store Framework). I had this issue in past during OIM Autologin .
Fix is to manually create WebGate Password, Keystore Password and Global Passphrase using FMW EM (/em)
Oracle ACE, Author, Speaker and Founder of K21 Technologies & K21 Academy : Specialising in Design, Implement, and Trainings.