title: How to fix "Unknown ruby interpreter version (do not know how to handle)"
body: <p>I have set up a ruby and ruby on rails environment on my Mac running Yosemite and am trying to work my way through a tutorial.  I am stopped from doing so immediately when I do the following in my bash terminal:</p>
  
  <pre><code>$ rvm use ruby-2.2.1@ learn-rails --create
  Unknown ruby interpreter version (do not know how to handle): learn-rails.
  </code></pre>
  
  <p>I believe everything is set up correctly.  Here's what I get when I do the following:</p>
  
  <pre><code>$ rvm list
  
  rvm rubies
  
     ruby-2.2.0 [ x86_64 ]
  =* ruby-2.2.1 [ x86_64 ]
  
  # =&gt; - current
  # =* - current &amp;&amp; default
  #  * - default
  </code></pre>
  
  <p>and:</p>
  
  <pre><code>$ ruby -v
  ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-darwin14]
  
  $ rails -v
  Rails 4.2.1
  
  $ rvm -v
  rvm 1.26.10 (latest) by Wayne E. Seguin &lt;wayneeseguin@gmail.com&gt;, Michal Papis &lt;mpapis@gmail.com&gt; [https://rvm.io/]
  
  $ echo $PATH
  /Users/jeff/.rvm/gems/ruby-2.2.1/bin:/Users/jeff/.rvm/gems/ruby-2.2.1@global/bin:/Users/jeff/.rvm/rubies/ruby-2.2.1/bin:/usr/local/heroku/bin:/Users/jeff/.rbenv/shims:/Users/jeff/.rbenv/shims:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/jeff/.rvm/bin
  </code></pre>
  
  <p>Thanks for your help in advance!</p>