title: Path error with Paperclip and JRuby on Windows
body: <p>I'm learning about <a href="http://jimneath.org/2008/04/17/paperclip-attaching-files-in-rails.html" rel="nofollow">Paperclip: Attaching Files in Rails</a></p>
  
  <p>I place these code to display image on show.html.erb</p>
  
  <pre><code>&lt;%= image_tag @user.photo.url %&gt;
  &lt;%= image_tag @user.photo.url(:thumb) %&gt;
  </code></pre>
  
  <p>On new page, I browse a file (.png) from my computer and click create.
  Then I got the error</p>
  
  <blockquote>
    <p>We're sorry, but something went wrong.</p>
  </blockquote>
  
  <p>How to solve this problem? Please help!</p>
  
  <p>When I check on development.log. I found these errors:</p>
  
  <pre><code>&gt;Status: 500 Internal Server Error
      The system cannot find the path specified
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/utils.rb:486:in
      initialize'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/utils.rb:486:in
      new'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/utils.rb:486:in
      parse_multipart'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/utils.rb:471:in
      loop'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/utils.rb:471:in
      parse_multipart'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/request.rb:268:in
      parse_multipart'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/request.rb:146:in
      POST'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/methodoverride.rb:15:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/params_parser.rb:15:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/session/cookie_store.rb:99:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/failsafe.rb:26:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/lock.rb:11:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:114:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/reloader.rb:34:in
      run'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:108:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/rails/rack/static.rb:31:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/urlmap.rb:49:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/urlmap.rb:41:in
      each'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/urlmap.rb:41:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/rails/rack/log_tailer.rb:17:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/content_length.rb:13:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/chunked.rb:15:in
      call'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/handler/mongrel.rb:67:in
      process'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:159:in
      process_client'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:158:in
      each'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:158:in
      process_client'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:285:in
      run'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:285:in
      initialize'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:285:in
      new'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:285:in
      run'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:268:in
      initialize'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:268:in
      new'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:268:in
      run'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/handler/mongrel.rb:38:in
      run'
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/commands/server.rb:111
      C:/jruby/jruby-1.5.0/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/commands/server.rb:31:in
      require'
      C:/jruby/jruby-1.5.0/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
      require'
      ./script/server:3
      ./script/server:2:in `load'
      -e:2
  </code></pre>