Christophe, I'm using slackware linux (glibc 2.1 and 2.2.13 kernel). I have a problem running GMSH due to an error loading libGL.so . My linux distribution comes with a libGLU.so and a libGL.so already, but I think there is a version problem. Could this be a problem with the Mesa? Utah-GLX? Thanks for your time and patience. Al Steffens alfred.p.steffens-jr at boeing.com