Hi all. AFAICU, configure should ask for x11-dev package (in case of Debian, this is libxmu-dev). Without this, nviz does not compile. All the best. pc -- Paolo Cavallini email+jabber: cavallini at faunalia.it www.faunalia.it Piazza Garibaldi 5 - 56025 Pontedera (PI), Italy Tel: (+39)348-3801953