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global $USER;
if (!is_object($USER)) {
   $USER = new \CUser();
}

// Бизнес процесс
if (Loader::IncludeModule('bizproc')) {
   $arWorkflowTemplates = \CBPDocument::GetWorkflowTemplatesForDocumentType([
      'lists', 'Bitrix\Lists\BizprocDocumentLists', 'iblock_' . $listId
   ]);

   foreach ($arWorkflowTemplates as $arTemplate) {
      /**
       * AUTO_EXECUTE = 1 - запускать при создании
       * AUTO_EXECUTE = 2 - запускать при изменении
       */
      if ($arTemplate['AUTO_EXECUTE'] == 1) {
         $wfId = \CBPDocument::StartWorkflow(
            $arTemplate['ID'],
            [ 'lists', 'Bitrix\Lists\BizprocDocumentLists', $elementId ],
            array_merge($arWorkflowParameters, [ 'TargetUser' => "user_{$USER->GetID()}" ]),
            $arErrorsTmp
         );

         if (count($arErrorsTmp) > 0) {
            foreach ($arErrorsTmp as $e) {
               $errorMessage .= "[".$e["code"]."] ".$e["message"]."";
            }
         }
      }
   }
}