[Al Skierkiewicz]

Autodesk is moving to XML files instead of the old acad text files for menus and customization. When you get the XML error message, either the file is calling for something that isn't installed or your previous version (do you have one on this computer?) included something that is no longer supported with Inventor 10. You may have inadvertantly chosen the missing surface type and that is why the parts don't display. They are probably there but the visibilty is 100% transparent. Try setting to a different surface, shading, or shininess and see if you get your parts back.