OLE Link to Word 97-2003 File May Fail with OLE_E_CLASSDIFF Error on Open

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You may encounter an OLE_E_CLASSDIFF (0x80040008) error on calls to OleRun or IOleObject::DoVerb when attempting to bind to a Word document saved as an OLE link by Word 2007.  See the following post for details:

OLE Link to Word 97-2003 File May Fail with OLE_E_CLASSDIFF Error on Open