A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: site/page.php

Line Number: 4

Backtrace:

File: D:\AppServ\www\pantong\application\views\site\page.php
Line: 4
Function: _error_handler

File: D:\AppServ\www\pantong\application\libraries\Layout.php
Line: 19
Function: view

File: D:\AppServ\www\pantong\application\controllers\Site.php
Line: 49
Function: view

File: D:\AppServ\www\pantong\index.php
Line: 315
Function: require_once