Hi,
A very small database. Actually just a demodatabase, we are using.
However, today I got the problem solved 
I uninstalled my 365BC and installed 365BC ***.upd. 5 and went through the whole proces once again.
This time without any problems, so now we have a new demo-database without recreating demodata
Well, seen strange issues before.
Don’t spend all energy on the RTM- and first ***.updates. Wait some months, and you avoid a lot of unnecessary grey hair 