Canon camera err 99

Error 99 is when the lens contacts aren't making good contact with the matching gold contacts on the lens opening of the camera body.
An easy remedy is to take a clean pencil eraser and lightly clean the contacts on the lens and the camera body. Be sure to not let any eraser crumbs fall into the camera body....
Reinstall the lens and see if your error is cleared.
K

This happens with some camera and lens combinations. You have to remove the battery to reset it. I have this problem on my EOS 50D, but only with ONE lens. I don't use that lens on that camera any longer, and the problem has never returned.

This is one possible solution of many possible causes.

U can check camera body using another EF lens.

is that dosen't work i think error is on the body