[Wintermute0110]

...

14:18:09.108 T:4976 ERROR: AEL INFO : _command_run_rom() final arguments "dayton93"

According to the log now the argument substitution works, you get the ROM name without the extension... which means the problem should be somewhere else.

Can you please open a Windows console (cmd.exe) and try to launch the games manually? For example:

Code:

c:> c:\emulator_multicpu.exe dayton93

Do some tests until you get a command line that works and report the results.