PLAYHAVOCK YOU NEED THE WARPLAN FILES (SUCH AS OPTIMAL.TXT) TO BE IN MAFIA'S DATA DIRECTORY AND YOU CAN SPECIFY WHICH WARPLAN TO USE BY EDITING THE OCW_WARPLAN FIELD IN YOUR VARS_MYNAME.TXT FILE, AND THERE IS MORE DOCUMENTATION ON THE OCW SCRIPT (WHICH GENERATED THAT ERROR)
HERE.
I tend to only write comments if I'm sure that even I wouldn't understand the code when looking at it the following day! (Comments make the file bigger! slower downloads! less efficient!) I guess that puts me squarely opposite Bale -- and I'd say dj_d is somewhere in the middle given that spectrum.