Hello, I would like to know if a PIB class can be extended from a class of another PIB? Thank you very much, Mai Trang ---------------------------------------------------- Nguyen Thi Mai Trang Ecole Nationale Superieure des Telecommunications Dept. INFRES - Bur. C234-4 46 Rue Barrault - 75013 Paris Tel: 01 45 81 74 61 - Fax : 01 45 81 31 19 email : trnguyen@enst.fr