Two days ago I got an Error 06 when shooting with the Mamiya 645 AFD II body and a HM401 film back. The film stopped at frame 13 with Error 06 message in the viewfinder. I tried a couple of more shots and the shutter worked but the film did not proceed. I moved the film back to the Mamiya 645AFD III body and continue shooting without any problem. When I received the film back from the lab the frame 13 was a multiexposure shot, everything else was OK.
Since I moved the back to another body and continued shooting without a problem this excludes the possibility of a film back problem and it seems there is a problem with the 645 AFD II body.
Previously I did not experience any problem with this body except for the fast battery drainage if batteries are left in the grip - they drain overnight (I do not have this problem with the AFD or the AFD III body). I use Sanyo Eneloops.
Does anyone here have any idea of what Error 06 is and how to eliminate this problem?