Why do I get "Could not find 'railties' error with Rails server?

Question

When I start my Rails server using rails s, I getting this error:

/usr/local/lib/site_ruby/1.8/rubygems/dependency.rb:296:in `to_specs': Could not find 'railties' (>= 0) among 10 total gem(s) (Gem::LoadError)
from /usr/local/lib/site_ruby/1.8/rubygems/dependency.rb:307:in `to_spec'
from /usr/local/lib/site_ruby/1.8/rubygems/core_ext/kernel_gem.rb:47:in `gem'
from /usr/bin/rails:22

How do I fix it?

Answer 1

Try:

bundle install

Then start your server with this command:

bundle exec rails s

Answer 2

There might be something wrong with your rails install. Try gem list, if you don't see railties then re-install rails: gem install rails

Answer 3

If you install a new gem don't forget to bundle install and start your server again.