Database with no tables returns error

[eluser]Marcone Ramos[/eluser]
I want the app run with no table defined in the database, it will install the tables according to user choices. Right now I have just a simple controller.

Code:

class bm_loader extends CI_Controller{

public function __construct() {
  parent::__construct();
  
}

function index() {
  echo 'debuggin';
}

}