Hi Following a suggestion from Moshez, I rewrote his UDP classes in order to get them somewhat more usable (eventually aiming at DNS protocol implementation). the example in doc/examples/udp-echoserv.py is now obsolete and will not work. Instead, UDP integrates neatly into doc/examples/echoserv.py Pezz. -- Itaï Ben-Yaacov Équipe de Logique Mathématique UFR de Mathématiques (case 7012) Université Paris 7 2 place Jussieu 75251 Paris Cedex 05 Email: pezz@logique.jussieu.fr