Based on your log that you posted it seems that it's sending this to the command-line why is why it may not be working: Supermodel.exe "[ROMPATH]\[ROM]" -res=1024,768 -fullscreen My guess is because you're using a MAP file? Usually arcade emulators use the [ROM] convention but I'm thinking this emulator needs the [ROMFILE] convention instead. So if you are using my map file then I suggest trying the following for testing: Supermodel.exe "[ROMPATH]\[ROM].zip" -res=1024,768 -fullscreen If this works then I'll adjust the MAP file to accommodate this emulator. Please report back.