Tag Archives: Rails

Error running Development: Rails 3.x launcher script was found instead of Rails 4.x one.

Error running Development: XXXX: Rails 3.x launcher script was found instead of Rails 4.x one. You need ‘C:/XXXX/bin/rails’ script to launch Rails server. Please update server launcher according to Rails 4.x documentation.

We had an error when upgrading from rails 3.2 to 4.0.0. To resolve it, you need to adapt the project structure by renaming the script directory into bin.

Now you should have /bin/rails and no more error.

If you still have a problem, just create a new rails project and copy the bin folder to your old one that need an upgrade to 4.0.0.

Rails 4.0.0 Release Notes

Compatibility problem between gems, RubyGems or Bundler ?

I tried a prerelease of ruby and I had a nice compatibility problem when gem update command

It seems bundler is not compatible with the new Rubygem version.

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How to install your Ruby Rails environment

Before playing with rails, you have some prerequisites. You need the ruby engine, a DevKit to let you compile native extension and the rails gem.

I will show you how to install all of them on windows. It’s a lot easier on Linux ! (apt-get install ruby && gem install rails)

  • Grab the latest installer 32 or 64 bit, install it on C:\Ruby
  • Download the DevKit too, if you don’t have MinGW installed on your computer, take the MinGW included auto extractor 32 or 64 bit. Extract it on C:\DevKit Read More →