Thanks for reply. I have created a new mpsave directory, but it won't work either. I try reinstall whole game, create mpsave directory, and add your mod at first time, but failed again, the same error message show up again,
I try to play at multiplayer mode for a while and save game normally, quit game and install your mod, but still cannot get the work done, same error,
I use gog version vanilla bg2, does this matter?