A PHP Error was encountered

Severity: Notice

Message: Undefined index: target_key

Filename: core/MY_Controller.php

Line Number: 75

Backtrace:

File: /home/engeiuser/script/sc_plant_ai/application/core/MY_Controller.php
Line: 75
Function: _error_handler

File: /home/engeiuser/script/sc_plant_ai/application/controllers/Index.php
Line: 23
Function: __construct

File: /home/engeiuser/script/sc_plant_ai/public/index.php
Line: 321
Function: require_once