As promised to Chetan... I stumbled across a frustrating incompatibility whilst installing OBI EE 10.1.3.3.3 on a Windows machine earlier.
OBI EE requires Version 2 of MS .NET Framework.
During OBI EE installation, it also launches the installer for Microsoft .NET Framework V2.
However, if you already have a later version of .NET Framework loaded, the .NET Framework install will end with an 'Incompatibility' error.
The OBI EE installation completes successfully.
However, it fails to deploy the analytics application to the OC4J instance correctly.
My workaround was to deinstall the later .NET Framework from the machine and then, restart the OBI EE installation process.
Let me know if you have a better solution!