A PHP Error was encountered

Severity: Warning

Message: call_user_func_array() expects parameter 1 to be a valid callback, class 'Error' does not have a method 'error_404'

Filename: core/CodeIgniter.php

Line Number: 532

Backtrace:

File: /data/www1/htdocs/investor/library/publication/index.php
Line: 293
Function: require_once