NoMethodError in News#view

Showing news/view.rhtml where line #5 raised:

undefined method `subject' for nil:NilClass

Extracted source (around line #5):

2: news ||= @news;
3: %>
4: <div class="newsBlock">
5:   <%= content_tag("h3", news.subject) %>
6:   <%= content_tag("span", news.postdate.strftime($newsdatefmt))  %>
7: </div>
8: <%= content_tag("p", news.contentbody) %>

RAILS_ROOT: /opt/InkomusWEB

Application Trace | Framework Trace | Full Trace
app/views/news/view.rhtml:5:in `_run_erb_47app47views47news47view46rhtml'
/usr/bin/mongrel_rails:129:in `run'
/usr/bin/mongrel_rails:282

Request

Parameters:

{"permalink"=>"vakansii"}

Show session dump

Response

Headers:

{"Cache-Control"=>"no-cache",
 "cookie"=>[]}