@overlord73978 You should have downloaded a complete set of roms that is labelled accordingly. For Mame4All you need roms from the 0.37b5 set. I am guessing that because you don't know, you just downloaded a few random roms and tried to launch them in a mame emulator? A common mistake and the path to great frustration. MAME requires patience and an accurate set of roms that match the emulator of your choice. You can verify the roms you have using clrmamepro. The best way to use MAME in an "enjoyable" way currently is to first choose an emulator - lr-mame2003 - then find a set of roms that is compatible with it, i.e. the 0.78 romset. Before proceeding, you should read this very carefully as it will demolish any confusion you may have......
https://retropie.org.uk/forum/topic/2859/how-to-use-mame-with-retropie-help-guide
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