I have a canon EOS 400D digital camera, which I purchased in July. The camera originally gave an error message No 99, now it says the. Err 99" is a generic catch- all error code on the 350D, and can mean. I have a 17 - 85mm IS lens that has an Err 1 on a Canon EOS 40D. Error 99: Cómo aprendí a dejar de preocuparme y amar mi Canon EOS 30D. Ahora que el miedo ha pasado y ya me he recuperado de mi.