Renaming marker elements?

[Erenford]

Hello,

I'm trying to rename an elevation marker element, but it seems nothing is happening to the element. There is no error in "ACAPI_Element_Change()" but the id/name doesn't change.

The code is below. I've also tried section/interior elevation, same thing happens, with memo or without memo. Another way I could think is renaming the navigator item of the marker, but "APIEnv_ChangeNavigatorViewID()" crashes (seems renaming in navi in Project Map is not allowed?)

	GSErrCode err = NoError;
	API_Element elem_elev;
	GS::Array<API_Guid> elemList;
	ACAPI_Element_GetElemList(API_ElevationID, &elemList);
	size_t count = elemList.GetSize();
	for (short e = 0; e < count; e++)
	{
		BNZeroMemory(&elem_elev, API_ElementSize);
		elem_elev.header.typeID = API_ElevationID;
		elem_elev.header.guid = elemList;
		err = ACAPI_Element_Get(&elem_elev);
		if (err != NoError)
		{
			WriteReport("[Error] %s "__FUNC__" - ACAPI_Element_Get()", ErrId2Name(err));
			continue;
		}

		GS::UniString name = elem_elev.elevation.segment.cutPlName;
		if (name != "ELEVATION 1")
			continue;

		API_ElementMemo memo;
		BNZeroMemory(&memo, sizeof(memo));
		err = ACAPI_Element_GetMemo(elemList, &memo);
		if (err != NoError)
		{
			WriteReport("[Error] %s "__FUNC__" - ACAPI_Element_GetMemo()", ErrId2Name(err));
			continue;
		}
		API_Element mask;
		ACAPI_ELEMENT_MASK_CLEAR(mask);
		ACAPI_ELEMENT_MASK_SET(mask, API_ElevationType, segment.cutPlIdStr);
		ACAPI_ELEMENT_MASK_SET(mask, API_ElevationType, segment.cutPlName);
		GS::ucscpy(elem_elev.elevation.segment.cutPlIdStr, L"TEST");
		GS::ucscpy(elem_elev.elevation.segment.cutPlName, L"CHANGE NAME");
		ACAPI_OpenUndoableSession("TEST");
		GSErrCode err = ACAPI_Element_Change(&elem_elev, &mask, &memo, APIMemoMask_All, true);
		if (err != NoError)
		{
			WriteReport("[Error] %s "__FUNC__" - ACAPI_Element_Change()", ErrId2Name(err));
		}
		ACAPI_CloseUndoableSession();
	}