That makes no sense to me because you are not specifying anything to run. Not that I fully understand what the PC command is supposed to do anyway.
I tried it anyway, and nothing happened, I generated my list (successfully) and tried to run the bat three times, it never even showed up in the log:
1/22/2008 2:32:09 PM MAMEWAH v1.62 launched
1/22/2008 2:32:09 PM Cursor scheme: (None), Arrow: (None), Wait: (None), AppStarting: (None)
1/22/2008 2:32:09 PM Desktop colour: 0
1/22/2008 2:32:09 PM Wallpaper filename: firefox.bmp
1/22/2008 2:32:09 PM Desktop display mode: 1920x1200 @ 60Hz, 32bit colour
1/22/2008 2:32:09 PM Decimal symbol: '.'
1/22/2008 2:32:09 PM Games list read: mame-0.lst
1/22/2008 2:32:09 PM Layout selected: C:\Emulators\config\layout.lay
1/22/2008 2:32:09 PM No. joystick devices attached: 0
1/22/2008 2:32:09 PM Ctrlr file selected: C:\Emulators\config\mamewah.cfg
1/22/2008 2:32:09 PM Keyboard enabled
1/22/2008 2:32:12 PM List generation started...
1/22/2008 2:32:12 PM List generation finished
1/22/2008 2:32:12 PM Games list read: mame-0.lst
1/22/2008 2:32:19 PM MAMEWAH quit
Maybe Ill just switch to MaLa and see if I can get it working there, does anyone else have any suggestions here?