Except… it does exist.
full size pic: link
So what is up with the error?
edit: may have fixed it… will report back after playtest tonight (if you want to join in, http://blog.dfyb.net/?page_id=654 )
I think this may have been caused by allocating the viewID myself without having the script set as the observed property. Not 100% sure though (what made me take a look was a problem caused/fixed by something else).
I get this a lot too. It usually is because I’ve destroyed said object, so I receive a message for a non-existing object, which causes the error.