Aspose.Words 4.0.3.1 includes Beta of RTF and WordprocessingML import features. The download is available here http://www.aspose.com/Community/forums/ShowThread.aspx?PostID=62813

You can try this:

Document doc = new Document(MyPath + “MyFile.rtf”);

and

Document doc = new Document(MyPath + “MyFile.xml”);

Note that ability to export to RTF and WordprocessingML is not Beta, these features were released in Aspose.Words 4.0.

To save in RTF or WordprocessingML do this:

doc.Save(MyPath + “MyFile.rtf”, SaveFormat.Rtf);

and

doc.Save(MyPath + “MyFile.xml”, SaveFormat.WordML);