Rails 3.0.3 Generator NoMethodError On Existing Project

I haven't had any luck. Does anyone else here have suggestions/hints?
This is an extremely frustrating issue. :confused:

Try removing all non-standard gems from your Gemfile, run bundle
install and try the generate again. If that works (it may not but at
least you have ruled out one possibility) then add them back in till
you find the one that is causing the problem.

Colin