A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'page_title' of non-object

Filename: models/Building_model.php

Line Number: 29

Backtrace:

File: /var/www/richhouse/application/models/Building_model.php
Line: 29
Function: _error_handler

File: /var/www/richhouse/application/controllers/Building.php
Line: 39
Function: getBuildingtital

File: /var/www/richhouse/index.php
Line: 315
Function: require_once