I have much to say about the in-place upgrade to Hyperion / Oracle EPM 11.2.5. Anybody who knows me well... knows that I pretty much despise Hyperion in-place upgrades, and moving to 11.2.5 in-place is no exception. In fact, it may be one of the harder ones.
We've already talked on this blog previously about how applying the quarterly Oracle Critical Patch Update ("CPU") for Oracle Fusion Middleware - OPatch for Weblogic in particular - currently bricks your in-place upgrade from either 11.2.3 or 11.2.4 to 11.2.5.... unless you backed up your Middleware folder prior to patching it.
But this post is about other factors that'll make you want to tear your hair out.
Let's begin with OPMN.