Restrictions after opening rosters
 

If you are creating a dogs of war army list and open for example a previously saved dwarf army list, then AB complains about you not having a paymaster. The same goes for bretonnians (complains about bsb and kotr), ogre kingdoms (not enough bulls) and probably other armies with specific requirements. These are the ones I tested with

i have encountered this myself too.
i closed and re-opened AB to continue.

Right, restarting helps here.
After lading a Vampire list the following list wants to have a magic user.
Maybe there is some cleaning procedure neccesary when switching the race.

Indeed, it also helps if you just start a new roster with a "normal" army and after that open the army list you want to work with. I haven't had any actual problems with this bug, just wanted the data file editors to notice it ^^

thx, i have reported this as a bug, unfortunately it is a bug in armybuilder and i cannot fix it in the datafiles :~(