The current version of xlispstat is 2.1R2. Complete sources as well as Macintosh executables are available in this directory. Upgrades form 2.1R1 sources ar available in two forms: files2.1R1-2.1R2.tar.Z is a compressed tar file containing the files that have changed from 2.1R1. Untar this, and copy the files onto a 2.1R1 distribution diffs2.1R1-2.1R2 contains context diffs for the changes in a form suitable for use with the patch program. From the top of a clean 2.1R1 distribution, you can apply the patch with patch -p0 < diffs2.1R1-2.1R2 The patch program is available for anonymous ftp from several sites, including prep.ai.mit.edu in directory pub/gnu.