A PHP Error was encountered

Severity: Notice

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

Filename: detail_v/content.php

Line Number: 74

Backtrace:

File: /home/birpatent/domains/1e1patent.com/public_html/application/views/frontend/site/detail_v/content.php
Line: 74
Function: _error_handler

File: /home/birpatent/domains/1e1patent.com/public_html/application/views/frontend/site/detail_v/index.php
Line: 28
Function: view

File: /home/birpatent/domains/1e1patent.com/public_html/application/controllers/Detail.php
Line: 164
Function: view

File: /home/birpatent/domains/1e1patent.com/public_html/index.php
Line: 322
Function: require_once