A PHP Error was encountered

Severity: Notice

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

Filename: _include/content_title_v.php

Line Number: 4

Backtrace:

File: /polyol/www/application/views/front/_include/content_title_v.php
Line: 4
Function: _error_handler

File: /polyol/www/application/views/front/_layout/layout_sub_v.php
Line: 42
Function: view

File: /polyol/www/application/core/FRONT_Controller.php
Line: 198
Function: view

File: /polyol/www/application/controllers/front/Letter.php
Line: 163
Function: _view

File: /polyol/www/index.php
Line: 315
Function: require_once