My CI project doesnt show any error and it is only show HTTP ERROR 500.
I have searched already and done these:    
define('ENVIRONMENT', 'development');
    case 'development':
    error_reporting(E_ALL);
    ini_set('display_errors', 'On');
    ini_set("error_reporting","E_ALL & ~E_NOTICE & ~E_STRICT");
    break;
Also tested
ini_set('display_errors', 1);
But nothing changed.
Any help would be apriciated.
