Hello I'd like to report a bug. When I transform a 3D mesh into an 2nd order 3D mesh (set order 2 ; incomplete elements options selected) the numbering of nodes is correct saving with .unv format but wrong saving with med format (the elements are inverted). see http://code-aster.org/forum2/viewtopic.php?id=21490 for illustration. Yours Pierre Lemerle.