gem install error, index not found, ruby on rails

Question

Problem: Cannot install any gem, any type. But I want to install riddle if that matters.

When I run sudo gem install \"gem_name\" I get the following error:

Answer 1

I was having the same problem and ran the following:

gem env

And saw that I had the following sources in my rubygems configuration:

• http://gems.rubyforge.org
• http://gems.rubyonrails.org
• http://gems.github.com

Based on other answers I've seen here and on the web I decided to remove the rubyonrails.org reference:

sudo gem sources -r http://gems.rubyonrails.org

I was then able to install the gem I was trying to get without the RubyGems 1.2+ index error.

So I'd suggest trimming your list of sources down to just rubyforge and github and then trying to install the gem you want.