Hi All Say I have a .msh file with first-order tetrahedra and triangles. How can I ask Gmsh to convert these tet4 and tria3 to tet10 and tria6 by adding mid-edge nodes? Something like "refine by splitting" but for p instead for h. I only have the .msh file, not the original geometry. Any ideas? Regards -- jeremy theler www.seamplex.com