Fatal error: Call to a member function append_output() on a non-object in ...\system\libraries\Loader.php on line 708

[eluser]Unknown[/eluser]
Hi!

I'm new with codeigniter and I tried use it with CMS Made Simple.

I just made a simple call in the CMS, using User Defined Tags (feature of CMS MS):

$_GET["c"] = "welcome";
$_GET["m"] = "index";
include('ci/index.php');

Then the error fires:
Fatal error: Call to a member function append_output() on a non-object in ...\system\libraries\Loader.php on line 708


Anybody can help me?

Thanks