关于debug assertion failed!!!!

debug assertion failed!file:......\atlcom.h
line 149 HRESULT GetPropertyByName(LPCOLESTR lpsz, VARIANT* pVar)
{
ATLASSERT(p); //line 149
ATLASSERT(pVar);
DISPID dwDispID;
HRESULT hr = GetIDOfName(lpsz, &dwDispID);
if (SUCCEEDED(hr))
hr = GetProperty(p, dwDispID, pVar);
return hr;
}
有人碰到过这样的问题么？什么原因？