Thanks for the suggestionlilherc79 said:i wouldn't say "common". But it can occur and its a frequently seen error. Its a "general" error.
I've gotten it out of the fluke before.
Check your contacts on the lens. make sure their clean and alos the contacts on the camera. It shouldnt happen again.
If it happens consistently, then better to check the camera with a service.
Swap the lens. make sure its not the lens at fault. Try the lens on another body.