Error in stages in SMvC

[BSS]

  How to fix this: I was playing SmvC and when I was going to fight against Dr Doom, the mugen have the error that can´t be load the stage...What do I have to do about this?

[Acey]

How to fix this: I was playing SmvC and when I was going to fight against Dr Doom, the mugen have the error that can´t be load the stage...What do I have to do about this?

Your version of SMvC is very old. Try to download the most recent version (6.1)