A PHP Error was encountered

Severity: Warning

Message: Undefined variable $sub_header

Filename: views/course_structure.php

Line Number: 23

Backtrace:

File: /home/jntuhceh/public_html/application/views/course_structure.php
Line: 23
Function: _error_handler

File: /home/jntuhceh/public_html/application/controllers/Ku.php
Line: 4241
Function: view

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