Dear Dave, I afraid that this program is not maintained for many-many years
“An algorithm to find channels and cavities within protein crystals (CHANNEL)”: Oleg S. Kisljuk, Galina S. Kachalova and Nadejda Ph. Lanina ; J. Mol. Graphics, 1994, vol12 knowing that the principal programming power Oleg Kisljuk left his researches in structural biology about at the time of that publication. Galina Kachalova just recently stopped working in Hamburg so maybe somebody of her ex-colleagues knows her personal mail (if this may help). Best wishes, Sacha Urzhumtsev
