Tamron Zoom Telephoto AF 70-300mm f/4.0-5.6 LD Macro Autofocus Lens for Canon EOS "canon internal error occured" Questions

...error 99 in my Canon 300D I have been using my Tamron 70-300 lens with my Canon 300D for a little less than a year. A few days ago I started getting an error 99 in my Canon 300D when using the Tamron ...