ruby-on-rails - Rails コンソールの起動中にエラーが発生しました

Question

インスタント Rails コンソールを起動しようとすると、次のエラーが表示されます。以前は正常に動作していましたが、このエラーが表示されます。

C:\InstantRails\rails_apps\shovell>ruby script/console
Loading development environment (Rails 2.0.2)
C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require': no such file to load -- application (MissingSourceFile)
    from C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
    from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/console_with_helpers.rb:19
    from C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
    from C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
    from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
    from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
    from C:/InstantRails/ruby/lib/ruby/1.8/irb/init.rb:252:in `load_modules'
    from C:/InstantRails/ruby/lib/ruby/1.8/irb/init.rb:250:in `each'
    from C:/InstantRails/ruby/lib/ruby/1.8/irb/init.rb:250:in `load_modules'
    from C:/InstantRails/ruby/lib/ruby/1.8/irb/init.rb:21:in `setup'
    from C:/InstantRails/ruby/lib/ruby/1.8/irb.rb:54:in `start'
    from C:/InstantRails/ruby/bin/irb:13