The server has been running 6.0.10 for a couple of weeks.
The problem may be related to adding a profile on a computer for
a new user. AC needs to run what I call the the short setup, where the location of the data is added. The problem was present in 5.0.29 and 5.0.28.
It is a show stopper, the codes.* file is missing. Needs to be restored from a backup.