Don’t install JDev and BPM in the same Home
By Mark Nelson on Nov 23, 2011
I don’t think this is actually documented anywhere, but it is something that you will want to be aware of if you are using the BPM 126.96.36.199 Feature Pack.
It is not supported to install the Feature Pack patch into an Oracle Home which contains JDeveloper and the runtime components (WebLogic, SOA, BPM, etc.)
If you are installing on the same machine, like a developer’s machine for example, you should install JDeveloper into a separate Oracle (Middleware) Home.