no such file to load -- opendirectory/user

Hello everyone, I encountered a problem when i launch a Rails Application with "Run as" in RadRails.

It is not a problem on my project but on the installation of RadRails or the gem package or Ruby On Rails... I am lost !

This is the message created in the console :

"13580" => Booting Mongrel (use 'script/server webrick' to force WEBrick) => Rails application starting on http://0.0.0.0:3001 => Call with -d to detach => Ctrl-C to shutdown server ** Starting Mongrel listening at 0.0.0.0:3001 ** Starting Rails with development environment... ** Rails loaded. ** Loading any Rails specific GemPlugins ** Signals ready. TERM => stop. USR2 => restart. INT => stop (no restart). ** Rails signals registered. HUP => reload (without restart). It might not work well. ** Mongrel 1.1.4 available at 0.0.0.0:3001 ** Use CTRL-C to stop.

Processing Base#index (for 127.0.0.1 at 2010-03-02 08:45:07) [GET]   Session ID: 88ed1b808ed9394daa8279d902efd3aa   Parameters: {}

MissingSourceFile (no such file to load -- opendirectory/user):     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/1.8/rubygems/custom_require.rb:27:in `require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:495:in `require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:342:in `new_constants_in'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:495:in `require'     /Users/clementfarrugia/Documents/Aptana RadRails Workspace/ pcastserv/app/controllers/application.rb:14     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:203:in `load_without_new_constant_marking'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:203:in `load_file'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:342:in `new_constants_in'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:202:in `load_file'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:94:in `require_or_load'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:60:in `depend_on'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:442:in `require_dependency'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/rails-1.2.6/lib/dispatcher.rb:109:in `prepare_application'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/rails-1.2.6/lib/dispatcher.rb:39:in `dispatch'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/bin/../lib/mongrel/rails.rb:76:in `process'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/bin/../lib/mongrel/rails.rb:74:in `synchronize'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/bin/../lib/mongrel/rails.rb:74:in `process'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:159:in `process_client'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in `each'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:158:in `process_client'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `initialize'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `new'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:285:in `run'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `initialize'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `new'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel.rb:268:in `run'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:282:in `run'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in `each'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/configurator.rb:281:in `run'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:128:in `run'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/lib/mongrel/command.rb:212:in `run'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/mongrel-1.1.4/bin/mongrel_rails:281     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:488:in `load'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:488:in `load'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:342:in `new_constants_in'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:488:in `load'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/rails-1.2.6/lib/commands/servers/mongrel.rb:60     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/1.8/rubygems/custom_require.rb:27:in `require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:495:in `require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:342:in `new_constants_in'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/ dependencies.rb:495:in `require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/gems/1.8/gems/rails-1.2.6/lib/commands/server.rb:39     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/1.8/rubygems/custom_require.rb:27:in `require'     ./script/server:3     -e:2:in `load'     -e:2

Rendering /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/ lib/ruby/gems/1.8/gems/actionpack-1.13.6/lib/action_controller/ templates/rescues/layout.rhtml (500 Internal Error)

restart servers