Nothing valuable to add other than our system does the same thing. I logged in via SQLPlus as the reporting user and ran one of the view creation scripts included in the output and it worked just fine. There must be something else its trying to do that doesn't show in the logs. I looked again at the permissions that should be applied to the RML user account (based on the createRMLUser script) and they are all there.
What DB version are you on? We're on Oracle 10.2.0.4 and PPM 8.01