App crashing when showing report a second time

[Vachaun22]

I have an MFC application with a crystal reports activeX control on a dialog. All works fine when displaying the report once, but when attempting to run the report a second time by closing and opening the dialog again, there is an assertion after entering parameters and closing that dialog.

I'm not sure how to go about debugging because I can't set any break points. The failing code is simply checking whether an hWnd is a window at the following code:

[COLOR=green]// afxwin2.inl[/color]

_AFXWIN_INLINE void CWnd::UpdateWindow()
	{ ASSERT(::IsWindow(m_hWnd)); ::UpdateWindow(m_hWnd); }

It begins opening the dialog then croaks.

Here is the code in my dialog class:

[COLOR=green]// ReportViewer.cpp : implementation file
//[/color]
[COLOR=red]
#include "stdafx.h"
#include "Fuel_Refund_MFC.h"
#include "ReportViewer.h"[/color]

[COLOR=green]// CReportViewer dialog[/color]

IMPLEMENT_DYNAMIC(CReportViewer, CExtResizableDialog)

CReportViewer::CReportViewer(CWnd* pParent /*=NULL*/)
	: CExtResizableDialog(CReportViewer::IDD, pParent)
{
	[COLOR=blue]try[/color]
	{
		[COLOR=green]// Create instance of Application object[/color]
		m_Application.CreateInstance([COLOR=red]"CrystalDesignRunTime.Application.10"[/color]);
	}
	[COLOR=blue]catch[/color](_com_error& e)
	{
		[COLOR=green]// if errors occur, handle and display errors[/color]
		HandleError(e);
	}

	[COLOR=green]// initialize the m_Report variable to NULL[/color]
	m_Report = NULL;
}

CReportViewer::~CReportViewer()
{
}

void CReportViewer::DoDataExchange(CDataExchange* pDX)
{
	CExtResizableDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_ACTIVEXREPORTVIEWER1, pCtrlReportViewer);
}


BEGIN_MESSAGE_MAP(CReportViewer, CDialog)
	ON_WM_SIZE()
END_MESSAGE_MAP()


[COLOR=green]// CReportViewer message handlers[/color]
BOOL CReportViewer::OnInitDialog() 
{
	CExtResizableDialog::OnInitDialog();
	
	[COLOR=green]// TODO: Add extra initialization here[/color]
	HICON hIcon = LoadIcon(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDR_MAINFRAME));
	SetIcon(hIcon, FALSE);

    [COLOR=green]/*pCtrlReportViewer.ShowWindow(SW_HIDE);*/[/color]
	InitReport();

	[COLOR=green]// Add anchor to control[/color]
	AddAnchor( IDC_ACTIVEXREPORTVIEWER1, __RDA_LT, __RDA_RB);

	[COLOR=green]//return TRUE;  // return TRUE unless you set the focus to a control[/color]
	return FALSE;              [COLOR=green]// EXCEPTION: OCX Property Pages should return FALSE[/color]
}

void CReportViewer::InitReport()
{
	[COLOR=green]// A Dummy variant[/color]
	TRY
	{
		VariantInit(&dummy);
		dummy.vt = VT_EMPTY;

		[COLOR=green]/*CLSID CLSID_Application;
		CLSIDFromProgID(L"CrystalDesignRunTime.Application.10", &CLSID_Application);
		HRESULT hr = CoCreateInstance(CLSID_Application, NULL, CLSCTX_INPROC_SERVER , 
			__uuidof(IApplication), (void **) &m_Application);
		ASSERT(SUCCEEDED(hr));*/[/color]

		_bstr_t FileName( [COLOR=red]"Refund.rpt"[/color] );
		_variant_t vtEmpty(DISP_E_PARAMNOTFOUND, VT_ERROR);

		[COLOR=green]// Open the report using the OpenReport method[/color]
		m_Report = m_Application->OpenReport(FileName, dummy);
		m_Report->DiscardSavedData();
		

		pCtrlReportViewer.SetReportSource(m_Report);
		pCtrlReportViewer.Zoom(1);
		pCtrlReportViewer.ViewReport();
		[COLOR=green]//pCtrlReportViewer.ShowWindow(SW_SHOW);[/color]
	}
	CATCH_ALL(e)
	{
		AfxMessageBox(_T([COLOR=red]"An unhandled exception has occurred."[/color]));
	}
	END_CATCH_ALL
}

void CReportViewer::PostNcDestroy()
{
	[COLOR=green]// TODO: Add your specialized code here and/or call the base class[/color]

	m_Report.Release();
	m_Report = NULL;
	m_Application.Release();
	m_Application = NULL;

	CExtResizableDialog::PostNcDestroy();
}

[COLOR=green]// A utility COM error handler[/color]
void CReportViewer::HandleError(_com_error &e)
{
	IErrorInfo* pErrorInfo = e.ErrorInfo();
	HRESULT hr = e.Error();
	if (pErrorInfo)
	{
		BSTR bsDesc = NULL;
		pErrorInfo->GetDescription(&bsDesc);
		_bstr_t sDesc(bsDesc,false);
		::MessageBox(0,sDesc.operator LPCTSTR(), _T([COLOR=red]""[/color]),MB_OK);
		pErrorInfo->Release();
	}
}
void CReportViewer::OnSize(UINT nType, int cx, int cy)
{
	CExtResizableDialog::OnSize(nType, cx, cy);

	[COLOR=green]// TODO: Add your message handler code here[/color]
	if (!::IsWindow(pCtrlReportViewer.m_hWnd))
	{
		return;
	}
}

And to call the dialog I simply have a variable in the mainform class of that type and call like this:

CReportViewer Dlg;
Dlg.DoModal();