Fatal error: Call to a member function on a non-object

[eluser]tonanbarbarian[/eluser]
the issue is very simple
when you load a library it is created in the controller lowercase

try this it should work

Code:

<?php
class Main extends Controller
{
    function __construct()
    {
        parent::Controller();
    }
    
    function index()
    {        
        $this->load->library("Artigos");
        $val["title"] = "Altus :: Evoluçao em Automaçao";
        $this->artigos->showArticles(); // note lowercase
        $this->load->view("mainview", $val);
    }
}