Post count: 1827

sounds like your romset isn’t correct for mame4all ? but perhaps the config is not right.. check the mame.cfg – should be symlinks from /opt/retropie/emulators/mame4all/mame.cfg -> /home/pi/dists/retropie-rpi/opt/retropie/configs/mame-mame4all/mame.cfg and should have the correct rom path in it.

I can’t help more without actual logfiles etc and so on though. errors when launching are logged to /tmp/runcommand.log