Fatal Memory Error in version 3.1.6+

@owino
Does it happen if you just tries to load just one library?
Have you tried loading different libraries to see if all are failing or just one?

If you haven't made a custom session library try to load this one:

PHP Code:

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Test extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        $this->load->library('session');
    }
} 


Also for debugging purposes upload the latest version of CI on your server and set it up like a new application. Can you load the session library now?

What PHP version are you using? It may not be 100% compatible, consider upgrading or changing version.

@php_rocs and @InsiteFX: If he can't even load one library it can't be memory issue. He already have ~128MB of RAM (if it's not shared).