I need to refer to an external class in a custom process, how do I do that?
Process Designer, Custom Process Model (CPM) / Service Process Model (SPM)
November 2012 version and newer
External classes will require special care in custom process. As the custom process has its own namespace, users need to break out of it to reference a class that is defined at the root level.
To explicitly reference the root scope:
$cfg_obj = new \CTK_CONFIG('lithium');
You need to have the correct included path: Answer ID 6707: Include paths for custom process
...and to have successfully completed a require_once('ctk/classes.php') in this example