<table cellspacing='0' cellpadding='0' border='0' ><tr><td valign='top' style='font: inherit;'>Hi,<br><br>When I try to view a matrix with the option -mat_view_draw, or call MatView in side the code . I get :<br> <br>[0]PETSC ERROR: PETSc installed without X windows on this machine<br>proceeding without graphics<br><br>I reconfigure Petsc with the option --with-X=1, but the problem doesn't solved<br><br>Thanks<br><br>Waad<br><br></td></tr></table><br>