I found the file at http://www.gnu-pascal.de/binary/install-gpc-binary Can any of the binaries at http://www.gnu-pascal.de/binary/ run on an amd64? Tom Thomas D. Schneider, Ph.D. Senior Investigator National Institutes of Health National Cancer Institute Center for Cancer Research Gene Regulation and Chromosome Biology Laboratory Molecular Information Theory Group Frederick, Maryland 21702-1201 schneidt@mail.nih.gov https://schneider.ncifcrf.gov (current link) https://alum.mit.edu/www/toms (permanent link)