function postValidate()
 {
     $oWorkflow = $this->_handler->copyTrigger($this->_document);
     // catch disabled workflows.
     if (!is_null($oWorkflow) && (PEAR::isError($oWorkflow) || $oWorkflow->getStartStateId() === null)) {
         return;
     }
     $ret = KTWorkflowUtil::changeWorkflowOnDocument($oWorkflow, $this->_document);
 }