On Fri, 7 Oct 2011, Vincent Aravantinos wrote: > values should start with a low case char: EmptyGraph -> emptyGraph, AddNode > -> addNode what a silly thing, you are right, thank you Walter -- Walter Cazzola, PhD - Associate Professor, DICo, University of Milano E-mail: cazzola@dico.unimi.it Ph.: +39 02 503 16300 Fax: +39 02 503 16253 · · · ---------------------------- · · · ---------------------------- · · · ... recursive: adjective, see recursive ... · · · ---------------------------- · · · ---------------------------- · · ·