> $ mame sc3000 -window -cart /usr/share/mame/roms/sc3000/lode_runner_japan_europe.sg > Ignoring MAME exception: Unknown slot option 'codemasters' in slot 'slot' > Unknown slot option 'codemasters' in slot 'slot' > > > This looks like the effect of a misconfigured .ini file. There's no reason for this > option to be there with this system (and even for "nes" and clones it only ought to > be automatically determined based on the selected software list item).
I removed ~/.mame directory, the problem remains. I have made no edits to sc3000 configuration at all.