Redmine

Ruby version 1.9.3 (i686-linux)
RubyGems version 1.8.23
Rack version 1.4
Rails version 3.2.13
Active Record version 3.2.13
Action Pack version 3.2.13
Active Resource version 3.2.13
Action Mailer version 3.2.13
Active Support version 3.2.13
Middleware Rack::Cache, ActionDispatch::Static, Rack::Lock, #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0xa45fee8>, Rack::Runtime, Rack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger, ActionDispatch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp, ActionDispatch::Callbacks, ActiveRecord::ConnectionAdapters::ConnectionManagement, ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore, ActionDispatch::Flash, ActionDispatch::ParamsParser, ActionDispatch::Head, Rack::ConditionalGet, Rack::ETag, ActionDispatch::BestStandardsSupport, OpenIdAuthentication
Application root /usr/local/share/redmine
Environment production
Database adapter mysql2
Database schema version 20130217094251

The error occurs when I click on the Roadmap tab:

Started GET "/projects/teachingresearchinstitutui/roadmap" for 127.0.0.1 at 2013-05-29 23:05:29 -0700
Processing by VersionsController#index as HTML
Parameters: {"project_id"=>"teachingresearchinstitutui"}
Current user: daniel_brooks (id=3)
Rendered versions/_overview.html.erb (5.1ms)
Rendered versions/index.html.erb within layouts/base (7.4ms)
Completed 500 Internal Server Error in 29ms

ActionView::Template::Error (undefined method `closed_percent' for #<Version:0xd56d454>):
16: <% end >
17:
18: < if version.issues_count > 0 >
19: <= progress_bar([version.closed_percent, version.completed_percent], :width => '40em', :legend => ('%0.0f%' % version.completed_percent)) >
20: <p class="progress-info">
21: <= link_to(l(:label_x_issues, :count => version.issues_count),
22: project_issues_path(version.project, :status_id => '*', :fixed_version_id => version, :set_filter => 1)) %>
app/views/versions/_overview.html.erb:19:in `_app_views_versions__overview_html_erb__84348520_116703850'
app/views/versions/index.html.erb:13:in `block in app_views_versions_index_html_erb_891692239_110874620'
app/views/versions/index.html.erb:11:in `each'
app/views/versions/index.html.erb:11:in `_app_views_versions_index_html_erb__891692239_110874620'