Too bad the OP hasn't been on the forum since 2015 so no chance to learn what he/she did. But I'd reflash the firmware...see https://www.usa.canon.com …subtab=downloads-firmware for the download.
[Edit]Added information on the error message. See http://www.fredmiranda.com/forum/topic/1211899 and specifically the content at the last entry which I've quoted below. Unfortunately the camera may have to go back to the service shop for a few steps not previously done by the technician.
So, an update on this situation...
Canon AUS was not able to advise what caused this 'error' message, except to say that they were sure that it wasn't an error and that the camera was fine to use and should operate normally. They contacted Canon Japan for more information, which took a few days, but they got the answer. When the techs adjusted the lenses to the camera, the camera is plugged into their computer/system, and needs to switched into some special mode that allows the AF adjustments to be made. When the adjustments have been completed, the camera should be switched back out of that adjustment mode by flicking a switch or ticking a box in the computer software (not in the camera). It seems that step was not performed when the adjustments were completed. The message probably means "FAII" for Focus Adjustment II, or something like that.
I'm waiting to receive the camera back tomorrow or the day after. So nothing to be concerned about, but it seems the Canon techs had a bit of a fail moment on a simple task.