A PHP Error was encountered

Severity: Notice

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

Filename: controllers/Download.php

Line Number: 109

Backtrace:

File: /home/bpm/website/application/controllers/Download.php
Line: 109
Function: _error_handler

File: /home/bpm/website/index.php
Line: 315
Function: require_once