Error in Migration

I am a RoR newbie. I am getting this error when trying to migrate my 2.x project to 3.x project.

actionpack-3.2.13/lib/action_dispatch/routing/mapper.rb:109:in `normalize_path': undefined method `to_sym' for nil:NilClass (NoMethodError)

In that line i can see the following code options[$1.to_sym]||=/.+/?

why $1.to_sym ends with NilClass error

That means that $1 is nil. Does the stack trace show which line of your application code is causing the problem? What are you doing when you get the error? Post the full stack trace if you can't see what the problem is.

Did you google for how to upgrade an app to Rails 3, it is not the easiest thing for a beginner to do?

Colin