In my Gemfile, I have specified:
ruby '1.9.3', engine: 'jruby', engine_version: '1.7.9' But entering my Rails project directory makes rvm throw up this error:
RVM used your Gemfile for selecting Ruby, it is all fine - Heroku does that too, you can ignore these warnings with 'rvm rvmrc warning ignore /home/petey/rails/kotoba/Gemfile'. To ignore the warning for all files run 'rvm rvmrc warning ignore allGemfiles'. ruby-1.9.3,engine:jruby,engine_version:1.7.9 is not installed. To install do: 'rvm install ruby-1.9.3,engine:jruby,engine_version:1.7.9' However, I do have jruby 1.7.9 installed:
$ rvm list rvm rubies jruby-1.7.9 [ x86_64 ] ruby-1.9.3-p392 [ x86_64 ] =* ruby-2.0.0-p247 [ x86_64 ] # => - current # =* - current && default # * - default $ rvm use jruby Using /home/petey/.rvm/gems/jruby-1.7.9 $ ruby -v jruby 1.7.9 (1.9.3p392) 2013-12-06 87b108a on OpenJDK 64-Bit Server VM 1.7.0_25-b30 [linux-amd64] In fact, I can even select it with rvm use jruby and rails works fine.
Is there a problem with the ruby directive in the Gemfile?
I followed the official specification, which has a very similar example.
Edit: On running rvm install ruby-1.9.3,engine:jruby,engine_version:1.7.9 at the prompt, rvm proceeds to install ruby-1.9.3-p484. And once again, it shows the same error message on entering the project directory:
RVM used your Gemfile for selecting Ruby, it is all fine - Heroku does that too, you can ignore these warnings with 'rvm rvmrc warning ignore /home/petey/rails/kotoba/Gemfile'. To ignore the warning for all files run 'rvm rvmrc warning ignore allGemfiles'. ruby-1.9.3,engine:jruby,engine_version:1.7.9 is not installed. To install do: 'rvm install ruby-1.9.3,engine:jruby,engine_version:1.7.9' 
rvm install ruby-1.9.3,engine:jruby,engine_version:1.7.9? Does it tell you it's already installed?ruby-1.9.3-p484(MRI and not jruby). I'll let it finishing downloading, check rvm's behavior and report back..ruby-versionfile, which rvm will use before loading bundler, the Gemfile, and any other files