Getting errors using groups of rules validation

[eluser]acosatom[/eluser]
Hello,

I'm trying to validate a form using groups of rules declared as i indicated at the end.

The problem is that i don't know how showing individual errors for each form field.

I mean, from the controller is possible to know if all group is validated or not:

Code:

if ($this->form_validation->run('datos') == FALSE)

But also need to know which fields, the problem is i don't know how to deal with errors, because if I try it like when i used cascading rules, no read errors.

Code:

if(form_error('nombre')){ echo "Error en el nombre"; }

Assuming that using rule sets i have to declare errors previously for each field, where I do and how? Because this does not work for me:

Code:

$this->form_validation->set_message('nombre', 'Error Message nombre');

Anyone can help me?

Thanks

Code:

//////GROUPS OF RULES IN application/config/form_validation.php////////

    $config = array(
                     'datos' => array(
                                        array(
                                                'field' => 'nombre',
                                                'label' => 'Nombre',
                                                'rules' => 'trim|required|callback_username_check|xss_clean'
                                             ),
                                        array(
                                                'field' => 'apellido',
                                                'label' => 'Apellido',
                                                'rules' => 'trim|required|callback_username_check|xss_clean'
                                             ),
                                        array(
                                                'field' => 'nif',
                                                'label' => 'Nif',
                                                'rules' => 'trim|required|callback_nif_check|xss_clean'
                                             )
                                        ),
                     'email' => array(
                                        array(
                                                'field' => 'emailaddress',
                                                'label' => 'EmailAddress',
                                                'rules' => 'required|valid_email'
                                             ),
                                        array(
                                                'field' => 'name',
                                                'label' => 'Name',
                                                'rules' => 'required|alpha'
                                             ),
                                        array(
                                                'field' => 'title',
                                                'label' => 'Title',
                                                'rules' => 'required'
                                             )
                                        )                        
                   );

[eluser]acosatom[/eluser]
Come on, do better to the new arrivals!

Nobody knows how to get the errors?

Thanks.

[eluser]acosatom[/eluser]
Check your code because the errors are obtained in the same way.

[eluser]acosatom[/eluser]
Thanks man!!