Loading a library (works fine in native php)

[eluser]deco10[/eluser]
Its an error within the library (index undefined)

system/application/libraries/Cezpdf.php
system/application/libraries/Cpdf.php

Code:

<?php

//This is the Cezpdf.php file
//Not sure how I should go about letting this include there.
include_once('Cpdf.php');

class Cezpdf extends Cpdf {




//This is the Cpdf.php file
<?php

class Cpdf {

the error (occurs several times):

A PHP Error was encountered

Severity: Notice

Message: Undefined index:

Filename: libraries/Cpdf.php

Line Number: 1631