I realize that this was mostly discussed a long time ago, but no one seemed to search for any pattern (if one exists).
I have had my camera for three months. The problem has now shown up twice (ERR and CHA) in the last month. Both of those times I had pulled the camera out of my backpack to shoot a night scene. Anyone else find this pattern?
Removing the battery and replacing always fixed it (so it doesn't seem like a lens issue). And of course I've pulled it out of my backpack in the dark many times and it was fine.
I noticed one of the times that my camera was ON in my backpack. This made me suspicious that it might have accidentally triggered with the cap on. Reinforcing this idea, I forced the error once by covering the lens and shooting on automatic a few times. Subsequent tries failed (well - failed to make it fail).
Anyway, I was hoping if more of us could remember what we were doing when it happened, we might find a pattern.