You could at least have the decency and link to WIN32::OLE bridging to MATHCAD or Re^4: WIN32::OLE bridging to MATHCAD, of which your post is basically a duplicate. I guess without Mathcad at our disposal, the problem cannot be replicated by us. If the Mathcad people don't know of a problem then it is likely a difference in how Mathcad does OLE and everybody else (that is, Excel) does OLE.