A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: controllers/Download.php

Line Number: 72

Backtrace:

File: /home/u9151224/public_html/application/controllers/Download.php
Line: 72
Function: _error_handler

File: /home/u9151224/public_html/index.php
Line: 315
Function: require_once