The easy answer is to only use a romset that matches your MAME version. if you want to use a new MAMVE version with an old romset and don't want to update your set, use CLRMAME Pro to convert the set to the current version. Basically, this will copy valid roms to a new directory. If they don't work, they won't copy over. OR, go find a current romset and use it with a current version of MAME. OR, don't update at all. No '80's game has been updated in a while, so there is no need to update...