> I have two different versions of MAME running on my arcade machine. For years it has > worked flawlessly. I just noticed recently that when I try to run Neo Geo games I get > an error message and they will not run. This happens on both versions of MAME and > ONLY on Neo Geo roms.
Which versions of MAME?
Try deactivating cheats and remove highscore.dat. Try changing video renderer settings.