A PHP Error was encountered

Severity: Notice

Message: Undefined variable: data

Filename: models/Teaching_results_model.php

Line Number: 137

Backtrace:

File: /var/www/html/teachup/application/models/Teaching_results_model.php
Line: 137
Function: _error_handler

File: /var/www/html/teachup/application/controllers/Teaching_results.php
Line: 103
Function: getDataRow

File: /var/www/html/teachup/index.php
Line: 292
Function: require_once