Dear Jean-Francois, It seems I have trouble to use the command line option of gmsh in cygwin (version 1.45). For example, gmsh -help or gmsh -version gives me nothing. I also can not get the message while it is running (default verbosity is 2). Please help. It is working fine in the interactive mode. Lin Ji Department of Mathematics, Amos Eaton 407 Rensselaer Polytechnic Institute Troy, NY 12180