NoMethodError in Community#show

Showing community/show.html.erb where line #4 raised: 

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.name

Extracted source (around line #4): 

1: 
2: 
3: <div id="content-header" class="wegocommunity-header">
4:   <h1 id="title"><%= @community.name %> community</h1>
5: </div>
6: 
7: <div id="community-main-content">

RAILS_ROOT: /app/rails/releases/20080505160617

Application Trace | Framework Trace | Full Trace 
app/views/community/show.html.erb:4:in `_run_erb_47app47views47community47show46html46erb'
app/controllers/community_controller.rb:7:in `show'
/usr/local/bin/mongrel_rails:16:in `load'
/usr/local/bin/mongrel_rails:16

Request

Parameters: 

{"community_token"=>"login_form"}

Show session dump

Response

Headers: 

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