Error message: Can't open data/EVE Battle/f Error loading system data data/mugen1/f I get this error message when I try to open mugen. I replaced that system with the one that came with the screenpack and now I have a new problem. What am I missing? I'm using mugen 1.0 and this is a 1.0 screenpack downloaded from Doomguy's site.Įdit: I just realized I forgot mugen is reading the system file that's in the mugen1 folder and not the one in the data. The sound changed but not the gray background. I followed a tutorial that just tells you to copy ans paste the font and data folders, into the mugen folder to overwrite the old font and data but it's still showing the old screen.