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// Закрываем задачу: TASK_ID
CModule::IncludeModule('tasks');
$arFields = array('STATUS' => CTasks::STATE_COMPLETED);
$taskId = 12345; // ID задачи
$oTaskItem = CTaskItem::getInstance($taskId, 1); // 1 - USER_ID от чьего имени закрываем задачу
$oTaskItem->update($arFields);

public static function PostTaskForm($arTask, $userId, $arRequest, &$arErrors, $userName = "", $realUserId = null)

elseif (isset($arRequest['ecp']) && $arRequest["ecp"] <> ''    
         || isset($arRequest['INLINE_USER_STATUS']) && $arRequest['INLINE_USER_STATUS'] == CBPTaskUserStatus::Yes)
    $arEventParameters["APPROVE"] = true;

[630] Error getting parameters from server (code: ERROR_WRONG_CODE).

https://portal.site.ru/company/personal/user/{{Ответственный}}/tasks/task/view/{{ID}}/

net stop mysql
<wait 10 seconds>
net start mysql

Bitrix\Main\Loader::includeModule('bizproc');
// BP Start
// parameters for BP
$arWorkflowParameters = array();
$documentId = 'DEAL_' . $dealId;
$arErrorsTmp = array();
$wfId = CBPDocument::StartWorkflow(
    $bpTemplateID, // ИД_шаблона_ БП,
    array("bizproc", "CCrmDocumentDeal", $documentId),
    array_merge($arWorkflowParameters, array("TargetUser" => "user_".$userId)),
    $arErrorsTmp
);
$arResult = array(
    'wfId' => $wfId,
);