RichEditView error when closing VC.Net app

[BlackDice]

I have an app that I recently ported to .Net (an SDI app with Richedit as the view type). Everything is working fine and it runs fine with native and managed code mixed. But when I close the app, I get this error message:
===================================================
An unhandled exception of type 'System.NullReferenceException' occurred in FB.exe

Additional information: Object reference not set to an instance of an object.
====================================================
this is happening in the following procedure, which I have never touched. (the offending line is pointed out)



CRichEditCntrItem* CRichEditView::GetInPlaceActiveItem() const
{
ASSERT(m_lpRichEditOle != NULL);
CRichEditDoc* pDoc = GetDocument();
CRichEditCntrItem* pItem = NULL;

CReObject reo;
HRESULT hr = m_lpRichEditOle->GetObject(REO_IOB_SELECTION, &reo,
REO_GETOBJ_ALL_INTERFACES); //reo's interfaces are all in UNICODE
if (GetScode(hr) == S_OK && (reo.dwFlags & REO_INPLACEACTIVE))
{
pItem = pDoc->LookupItem(reo.poleobj);
if (pItem == NULL)
pItem = pDoc->CreateClientItem(&reo);
ASSERT(pItem != NULL);
}
return pItem;
} --------------------------------------------------------------------------------


I hope anyone can help me. Thanks

bdiamond