A PHP Error was encountered

Severity: Notice

Message: Undefined index: usuario_id

Filename: views/alumnos_escuela.php

Line Number: 147

Backtrace:

File: /home/automex/public_html/sistema/application/views/alumnos_escuela.php
Line: 147
Function: _error_handler

File: /home/automex/public_html/sistema/application/controllers/Escuelas.php
Line: 28
Function: view

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