My understanding is that the best practice is to patch the aip to the latest version and do upgrades from that patched version rather than patch individual installs (please correct me if I'm wrong).
I patched my 11.0.00 install to 11.0.01. The patch process went fine, but when I try to then run it against my current 11.0.00 install, it says that anothther version is already installed and installation cannot continue. Would appreciate some guidance on this.