Uh oh... Could you tell me where you encountered the error screen?
*EDIT: Looks like I found a new problem... I named a file wrong in the 3rd Dungeon Room. I'll keep looking for the music bug, and in the meantime find more bugs to fix...
Yeah, when I click on the .exe, the game is asking me if I want to load the music ("Y/N"). I type 'Y' then enter and it displays this error, that's why I played without music ^^