title: NameError (uninitialized constant ActionDispatch::ExceptionWrapper):
body: <p>Whatever error i get in my app i couldnt see the error in my logs am getting the below 
  message for all the errors am facing so i couldnt solve my error, could anyone help me out of this.??</p>
  
  <pre><code>Completed 500 Internal Server Error in 729ms
  
  NameError (uninitialized constant ActionDispatch::ExceptionWrapper):
  
  
  Rendered /usr/share/ruby-rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.3/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.3ms)
  Rendered /usr/share/ruby-rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.2ms)
  Rendered /usr/share/ruby-rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.3/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (7.7ms)
  </code></pre>