I've found a new entry on the bugtracker recently. The author informed that he gets "Nesting level too deep - recursive dependency" error while running the development examples provided by the newest OPTv2 dev version. I looked at it deeper and found out that he lowered the default nesting level limit 4 times from 64 to just 16. Obviously, this is a quite drastic change and would affect not only OPT, but many other scripts as well. However, I think it is time to take a look at the OPT issues concerning the requirements, because several of them needs a deeper explaination.