Installfest error, Rails can't find Railties


I’m working my way through installing/updating all the stuff I need to begin the Rails project “Getting your Feet Wet” and I cannot get Rails to even show me the version I’ve installed. Here’s my error message:

find_spec_for_exe': can't find gem railties (>= 0.a) (Gem::GemNotFoundException) from /Users/codybuffaloe/.rvm/rubies/ruby-2.3.4/lib/ruby/site_ruby/2.3.0/rubygems.rb:299:inactivate_bin_path’
from /Users/codybuffaloe/.rvm/gems/ruby-2.3.4/bin/rails:23:in <main>' from /Users/codybuffaloe/.rvm/gems/ruby-2.3.4/bin/ruby_executable_hooks:15:ineval’
from /Users/codybuffaloe/.rvm/gems/ruby-2.3.4/bin/ruby_executable_hooks:15:in `’

I have tried installing railties itself and removing and reinstalling rvm, ruby, and rails. Googling this issue doesn’t bring me any readily available solution so any help would be greatly appreciated.

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Hey @CodyB

Sorry to hear you’re having these problems.

I would follow these steps in your terminal

rvm install 2.5.0
rvm use 2.5.0
rvm --default use 2.5.0

That will update your Ruby. I know the installfest uses 2.3 but that’s a bit outdated. We didn’t write the installfest so unfortunately don’t control it. We are looking to bring this in house though.

Then open a new terminal and type the following one at a time

gem update --system
gem update bundler
gem install rails

Then try and pick up where you left off in the tutorial.

If you still have an issue let us know.


Thanks, I went through the steps you provided and now my error message reads:

Traceback (most recent call last): 4: from /Users/codybuffaloe/.rvm/gems/ruby-2.5.0/bin/ruby_executable_hooks:15:in
3: from /Users/codybuffaloe/.rvm/gems/ruby-2.5.0/bin/ruby_executable_hooks:15:ineval’
2: from /Users/codybuffaloe/.rvm/gems/ruby-2.5.0/bin/rails:23:in <main>'1: from /Users/codybuffaloe/.rvm/rubies/ruby-2.5.0/lib/ruby/site_ruby/2.5.0/rubygems.rb:308:in activate_bin_path' /Users/codybuffaloe/.rvm/rubies/ruby-2.5.0/lib/ruby/site_ruby/2.5.0/rubygems.rb:289:infind_spec_for_exe’: can't find gem railties (>= 0.a) with executable rails (Gem::GemNotFoundException)


Sorry to hear you’re still having a problem @CodyB :frowning:

Can you post the output of echo $PATH from your terminal?


Sure thing, it’s:




Did you install rvm, ruby or rails using the sudo command?


No, I don’t believe I did. Is there a way I can check if that’s the case? I’ve uninstalled and re-installed these so many times I’m not 100% sure I never tried a sudo install, but I know I didn’t use sudo while following your instructions, @CouchofTomato


Which OS are you using?


rvm get head
gem install rails

Then see what rails -v returns in your terminal.


I’m using MacOS(specifically OSX El Capitan). I ran those two and I’m no longer getting anything that says Traceback, but a similar error to before:

/Users/codybuffaloe/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems.rb:271:in find_spec_for_exe': can't find gem railties (>= 0.a) (Gem::GemNotFoundException) from /Users/codybuffaloe/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems.rb:299:inactivate_bin_path’
from /Users/codybuffaloe/.rvm/gems/ruby-2.4.1/bin/rails:23:in <main>' from /Users/codybuffaloe/.rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:ineval’
from /Users/codybuffaloe/.rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:in `’


Thanks Cody,

We seem to be in very different timezones so apologies this is taking a long time to solve.

rvm get head seems to have fallen back to the system Ruby so this is a good time to try tthe following commands again.

rvm install 2.5.0
rvm use 2.5.0
rvm --default use 2.5.0

*Open a new terminal

gem update --system
gem update bundler
gem install rails

One other thing you can do is make sure you haven’t accidentally created a Gemfile or Gemfile.lock in your home directory. rvm and bundler will try to read from there to find gems so if you’ve accidentally created a blank one it could be messing things up.

You can use ls -a in your terminal to view all the files. See if there is a Gemfile as that could be messing up config.

Let me know.


Hi @CodyB, can you let us know the output for this command please? which bundle


which bundle returns /Users/codybuffaloe/.rvm/rubies/ruby-2.5.0/bin/bundle

Fixed! It looks like I did have a Gemfile and a Gemfile.lock in my home directory. After removing them, I reinstalled 2.5.0 and, in a new terminal, I installed rails and now it works! I can type rails -v and I get Rails 5.2.0 !! It is currently building the test_app from the tutorial so I’m back on track!

Thanks again for all your help!



Fantastic. Glad you’re up and running. Enjoy the rest of the course.