New .sel file

I have built a new .sel file, and included my rpm list in it. I have added the file to <addon> in the xml file. I have run create_package_descr. Yet, every install I do, I get "Could not ... add-on " (can't recall exact words at this moment). In other words, it seems to have a problem with my .sel file. Can anyone assist? -- Jonathon Robison <jrobiso2@ford.com> Ford Motor Company