Well after trying to find out what the heck was going on, I found the source. My library.xml file was preventing BCSM (and oddly the other programs from working), and when I deleted it, everything was working fine again.

thanks everyone for their suggestions. ADJSonic, you might want to try this.

So I've recently gotten into Brawl hacking, and my top priority is custom music. I've pretty much gotten down how to make the files and even got my own custom looped music working. Up until today, I've used BCSM-GUI and Androu's music tool for making my songs. Today, when I attempted to open BCSM, the program crashes immediately and I get a message saying "BCSM-GUI has stopped working". I have the .NET framework 3.5 installed, so I hope that's the problem. I then tried to use Androu's tool, but when a Brstm was done being made, I got a Brstm file that was 0kb in size. I then tried using BrawlBox (which I haven't done before), and even that was unable to convert my wav file into a brstm.

Anyone have an idea as to what might be going on?