I recently used (or tried to use) my P67II in sub zero temp (around -7C) and it showed "Perr" message. I tried to detach the prism and the lens several times but didn't quite work. It will back on for 1 frame and then "Perr" again. I tried to pull the battery, put them in my pocket for a while, retried but it too didn't work. When I got back to my warm hotel room, the camera will function normally. Until now I haven't seen the message reappears. Does anybody have experience working with P67II in cold weather? BTW I have used the camera in around 0 Celsius without problem and I am using Duracell 123 lithium battery.