FEM: ccx binary, better error message if ccx binary exists but has problems to run, seen a lot on osx
FEM: ccx binary, better error message if ccx binary exists but has problems to run, seen a lot on osx

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master