NoMethodError in Statuses#index

I tried looking for another post to fix this error but couldn't find the right answer... I'm sure it's easy, but I'm such a newb! Here's the code:

Showing /Users/Home/Source/projects/treebook/app/views/statuses/index.html.erb where line #9 raised:

undefined method `full_name' for nil:NilClass

<% @statuses.each do |status| %>

<div class="status">

 <strong><%= status.user.full_name %></strong>

 <p><%= status.content %></p>

 <div class="meta">

   <%= link_to time_ago_in_words(status.created_at) + " ago", status %>

Rails.root: /Users/Home/Source/projects/treebook

Application Trace | Framework Trace | Full Trace app/views/statuses/index.html.erb:9:in block in _app_views_statuses_index_html_erb__2859690692118279184_70260199904980' app/views/statuses/index.html.erb:7:inapp_views_statuses_index_html_erb_2859690692118279184_70260199904980'

Now I've done some "tinkering" (not too much!) to try to fix this but to no avail... Any help is greatly appreciated!

Thanks.