MLC++ utilities are available through the world wide web at URL http://www.sgi.com/tech/mlc
Since version 1.3, the object code for the utilities is provided for Silicon Graphics hardware running IRIX 5.3 or 6.2.
Databases from UC Irvine that have been converted to our format (compatible with C4.5) are in ftp://starry.stanford.edu/pub/ronnyk/mlc/db
Please look at the README file that comes with the distribution.