Not sure if this is the right section.
My Nikon D7000 has an err flashing in the card window. I have cleaned the lens contacts and the camera contacts but this hasn't resolved the problem .
Any ideas please?
Is it with all lenses or just with that one?
Have you tried it with a different memory card in case that one is faulty?
I think it`s usually and F message for lens issues. an "Err" message usually means shutter button issue, settings wrong when shooting or a faulty start up. Try taking the battery and card out and putting it back in after 15 minutes or so with a different card.
All I can suggest - hope it resets OK