URI Routing not working - php

Question

I started working on a platform on CodeIgniter thanks to my work. The platform was started since before, so i just took the project. The thing is that i hadn't work with CI, so i just had a fast tutorial, and started developing based on how the platform was built. Now, to start, i decided to make a new page to to put a list of objects and understand a little how the PHP communicated with the HTML. The problem is that, when i go to the URL that i defined on routes.php, it gives an error "Requested resource does not exist", and i don't know what i'm doing wrong, while something similar works on other modules of the platform.
The files i'm using are:
list.php
// stuff
<?php if (has_access('agroindustrias')): ?>
<li class="<?php get_li_class('agroindustrias', $active); ?>" >
Agroindustrias
</li>
<?php endif ?>
// stuff
agroindustria.php
<?php
if (!defined('BASEPATH')) {
exit('No direct script access allowed');
}
class Agroindustria extends MY_Controller
{
public function __construct()
{
parent::__construct();
$this->load->model('agroindustria_model', 'agroindustria');
}
public function index($offset = 0)
{
$data['links'] = $this->paginate($this->agroindustria, 'agroindustrias', $offset);
$data['permisos'] = $this->getPermissions('usuario');
$data['active'] = 'usuarios';
$data['agroindustrias'] = $this->agroindustria->limit($this->limit, $offset)->get_all();
$data['submenu'] = $this->load->view('administracion/menu', $data, true);
$this->template->write_view('content', 'administracion/agroindustrias/list', $data);
$this->template->render();
}
}
routes.php(Updated with all the file, only the one before "reportes" doesn't work)
$route['administracion/agroindustria'] = 'agroindustria/index';
My URL is: http://localhost/work/administracion/agroindustria
The other controllers works with something similar, reason that i don't know what i'm doing wrong, if i still need to add something to another file, or if something that i wrote is wrong. Thanks in advance.

Answer 1

After the things that #Antony told me to check, i was able to find the error, it wasn't actually an error, just that the people before worked very much in the platform, that i did not undertand the mothodology to add new modules to the platform. All that i needed to do was register the new module, and the platform added the new URL as i wanted. Thanks Antony for your help!

Answer 2

1st of all rename agroindustria.php to Agroindustria.php if 1st letter not in upper case
if you are using method like this
public function index($offset = 0){
....
....
....
}
then you need to change routes like
$route['administracion/agroindustria/(:num)'] = 'agroindustria/index/$1';
and url
http://localhost/work/administracion/agroindustria/0
The best solution is change in your controller
//if offset not change
public function index(){
$offset = 0;
....
....
....
}
//if your offset depend upon 3rd segments of URL then
public function index(){
$offset = if($this->uri->segment(3)) ? $this->uri->segment(3) : 0;
....
....
....
}