Exception when deleting appointments in weekview

It happens in weekview when deleting by keyboard using command (DEL) from various days (ony by one).

XTP 17.3 (MFC) with VS2015

Hello Oleksandr,
I can't reproduce it with the Calendar Demo.
We use a cutom data provider in our sample. But the problem seems to be on a higher level.
Can you give use some information how that can happen?

Here is how we add Events:

//--------------------------------------------------------------------------------------- 
void CUICJCalendarView::OnRetrieveDayEvents(XTP_NOTIFY_CODE /*Event*/, WPARAM wParam , LPARAM lParam)
//--------------------------------------------------------------------------------------- 
{		
	XTP_DATE_VALUE oDate = (XTP_DATE_VALUE) wParam;
	CXTPCalendarEventsPtr* pEvents = (CXTPCalendarEventsPtr*) lParam; // [in/out] A pointer to pointer to events array
	COleDateTime dtStart = (DATE)oDate;
 
	XTRACE(+1, _T("CUICJCalendarView::OnRetrieveDayEvents( für %s )"), (LPCTSTR) dtStart.Format((UINT)IDS_DATEFMT_DDMMYYYYA));
	
	int nDayCount = GetCalendarCtrl().GetActiveView()->GetViewDayCount();
	COleDateTime dtCurrentViewStart = GetCalendarCtrl().GetActiveView()->GetViewDayDate(0);
	XTRACE(0, _T(" nDayCount = %d  and first date  (%s) "), nDayCount, (LPCTSTR) dtCurrentViewStart.Format((UINT)IDS_DATEFMT_DDMMYYYYA));
 
	if(*pEvents == NULL)
	{
		*pEvents = new CXTPCalendarEvents();
		(*pEvents)->InternalAddRef();
	}
	else
	{
		(*pEvents)->RemoveAll();
		(*pEvents)->InternalAddRef();
 
		ASSERT((*pEvents)->GetCount() == 0);
	}
	
	CWaitCursor oWait;	
 
	// fill events to my own cache (not the calendar cache)
	if(dtStart == dtCurrentViewStart && nDayCount > 1)
		AssignEventsToTmpCache(dtCurrentViewStart, nDayCount);
 
	CXTPCalendarEvents* pEventsOfDayFromCache = NULL;	
	int					nDBIDate = CMfxDateTime(dtStart).GetDBIDate();
	if(m_oMapTmpEvents.Lookup(nDBIDate, pEventsOfDayFromCache))
	{
		XTRACE(0, _T("OnRetrieveDayEvents Count = %d"), pEventsOfDayFromCache->GetCount());		
		// get value from my cache
		(*pEvents)->Append(pEventsOfDayFromCache);
		(*pEvents)->CloneEvents();
		XTRACE(0, _T("OnRetrieveDayEvents Count = %d"), (*pEvents)->GetCount());
	}
	else
	{	
		// get the events by query
		AssignEvents((*pEvents), dtStart);
	}
	
	(*pEvents)->InternalRelease();
		
	XTRACE(-1, _T("<<CUICJCalendarView::OnRetrieveDayEvents"));
}

//---------------------------------------------------------------------------------------
BOOL CUICJCalendarView::AssignEvents(CXTPCalendarEvents* pEvents, const COleDateTime dtDate)
//---------------------------------------------------------------------------------------
{
	XTRACE(+1, _T("CUICJCalendarView::AssignEvents(...,%s)"), (LPCTSTR) CMfxDateTime(dtDate).Format((UINT)IDS_DATEFMT_DDMMYYYYA));
	ASSERT(pEvents);
 
	ASSERT(m_poBLTMManager && m_pUITMFrame);
	ASSERT(m_poBLTMManager->GetOptions());	
 
	long                nDBIDate = CMfxDateTime(dtDate).GetDBIDate();   
    int                 nCount = 1; 
    CBLTMAppointData    oDlgData;   
 
	XTRACE(0, _T("CUICJCalendarView::AssignEvents Series  -------"));	
 
	for(int i = 0; i < nCount; ++i)
	{
		XTRACE(0, _T("GetDateEntryCount = %d"), m_pUITMFrame->GetDateEntryCount(nDBIDate + i));
		for(POSITION Pos = m_pUITMFrame->GetFirstDatePosition(nDBIDate + i)
			; Pos != NULL; )
		{
			if(m_pUITMFrame->GetNextDate(Pos, nDBIDate + i, oDlgData, CBLTMManager::TM_DATADETAIL_RECPAT | CBLTMManager::TM_DATADETAIL_ATTENDEES))
			{				
				CXTPCalendarEvent* ptrEvent = new CXTPCalendarEvent(GetCalendarCtrl().GetDataProvider());
				AssignEvent(ptrEvent, oDlgData, dtDate);
 
				pEvents->Add(ptrEvent);
 
				ptrEvent->InternalRelease();
			}			
		}
	}
 
	XTRACE(0, _T("CUICJCalendarView::AssignEvents single day appontments -------"));
	// Single Day Appointments
	CXDAVariantList oLstID;
	CDADateTime		oFromSpan(UIMfx2DADateTime(CMfxDateTime(nDBIDate, 0)));
	CDADateTime		oToSpan(UIMfx2DADateTime(CMfxDateTime((long)(nDBIDate+nCount-1), (long)MAX_TM_MINUTES)));
	if(m_poBLTMManager->GetListSingleDayAppointments(oLstID, oFromSpan, oToSpan))
	{		
		for(CXDAVariantList::const_iterator iterApp = oLstID.begin()
			; iterApp != oLstID.end()
				; ++iterApp)
		{
			CBLTMAppointData oTmpData;
			if(m_poBLTMManager->ReadAppointment(*iterApp, oTmpData, CBLTMManager::TM_DATADETAIL_RECPAT | CBLTMManager::TM_DATADETAIL_ATTENDEES))
			{								
				CXTPCalendarEvent* ptrEvent = new CXTPCalendarEvent(GetCalendarCtrl().GetDataProvider());
				AssignEvent(ptrEvent, oTmpData, dtDate);
 
				pEvents->Add(ptrEvent);
 
				ptrEvent->InternalRelease();
			}
		}
	}
 
	XTRACE(0, _T("CUICJCalendarView::AssignEvents Count = %d"), pEvents->GetCount());	
 
	XTRACE(-1, _T("<<CUICJCalendarView::AssignEvents"));
	return TRUE;
}
 
Thank you!

Thank you!

Unfortunately it soes not hit that breakpoint.
What if the pointer is deleted after it was assigned (missing AddRef and Release) ?

This is the Watch of m_pViewGroup. Is looks valid except m_pResources and m_pViewDay.