Reply To: Tried everything can't get Mame working

[Floob]

Try replacing your mame entry in that file with this:

    <system>
        <fullname>MAME</fullname>
        <name>mame</name>
        <path>~/RetroPie/roms/mame</path>
        <extension>.zip .ZIP</extension>
        <command>/opt/retropie/supplementary/runcommand/runcommand.sh 4 "/opt/retropie/emulators/mame4all-pi/mame %BASENAME%"</command>
        <platform>arcade</platform>
        <theme>mame</theme>
    </system>

That is the entry that relates to RetroPie 2.3 setup

and make sure your roms are in:
/home/pi/RetroPie/roms/mame