User blog comment:NintenFox974/Not responding./@comment-3495717-20141118121938/@comment-24808209-20141119131302

If stderr and stdout are blank, I have no idea what the problem is. As plas mentioned, stderr loads up when you're using MUGEN. Stdout is always there, and mine reads this:

Loading button config for P1 joystick. Loading button config for P2 joystick. Initializing keyboard. Initializing sound...ok Initializing BGM... OK Initializing graphics.

Basically, it loads all the configurations, sounds, music, so on. Try copying the above into your stdout and see if MUGEN works. If not, you might have to delete MUGEN altogether, and download it again (Make sure to backup your chars, music, and stages if you do).