I'm getting an error code 01 when using my camera with EFS 17-85mm lens attached. It seems to happen when the lens is on its widest angle, but not when I zoom to 85mm. I have tried cleaning the contacts, both with a pencil eraser and professional cleaning fluid, to no avail. The camera is approx 7 years old and has taken many 1000's of photo's during this time. Only recently has this problem occurred.
Any ideas what else I can do?