Change hardcoded "application" directory to use the APPPATH constant as it would not work if you relocate /application or /system folders outside of web root.

Author: CroNiX

user_guide_src/source/tutorial/static_pages.rst

@@ -97,7 +97,7 @@ page actually exists:
     public function view($page = 'home')
     {
                 
-        if ( ! file_exists('application/views/pages/'.$page.'.php'))
+        if ( ! file_exists(APPPATH.'/views/pages/'.$page.'.php'))
         {
             // Whoops, we don't have a page for that!
             show_404();