MFC Active控件退出时ASSERT(m_dwRef <= 1)出错

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MFC Active控件运行没问题  退出时CCmdTarget::CCmdTarget()报line 40 断言失败

CCmdTarget::~CCmdTarget()
{
#ifndef _AFX_NO_OLE_SUPPORT
if (m_xDispatch.m_vtbl != 0)
((COleDispatchImpl*)&m_xDispatch)->Disconnect();
ASSERT(m_dwRef <= 1);//在这里出错了
#endif
m_pModuleState = NULL;
}