In the DpdPolandController class you define the l() method, but more than once you're doing something like:
$this->module_instance->outputHTML($this->module_instance->displayError($this->module_instance->l('Could not delete old PDF file. Please check module permissions', 'manifestList.controller.php')));
In the DpdPolandController class you define the l() method, but more than once you're doing something like: