Hi Nekers, Do you have any experience on generating an axisymmetry mesh via "n2to3"? Now I want to extrude a 2D mesh into a 3D axisymmetry mesh. I found that the rotating axis is y-axis, does anyone know to define the rotating axis into x-directiong? when I keep the default rotating axis (y-direction) , n2to3 only works when there is no edge coincide with the y-axis. in this situation, there is a hole in the center, which is obvious wrong. For example, this is the 2D genbox file. 1 base.rea 2 2 spatial dimension (if negative dump binary re2 and .rea file) 3 1 number of fields 4 # 5 #======================================================================= 6 # 7 box_1 any string with 1st character .ne. "c" or "C" 8 -8 -4 1 nelx,nely,nelz (if <0, length to be equally divided) 9 -0.0 2.0 1. x_0 x_Nelx ratio 10 -0.5 0.5 1. 11 v ,O ,W ,W bc's ! west,east,south,north,bottom,top (fixed 3CHAR format) I want make an axisymmetry tube with the center line is y=0. I know the genbox can extrude a circle face into a tube. but here I want first try to this simple case. Since the mesh is axisymmetric, I choose the boundary type of Z(5) and Z(6) as "E". It can generated the 3D.rea. but after I run genmap, it failed, even I try the much smaller tolerance. NOTE: smaller is better, but generous is more forgiving for bad meshes. 0.1 reading .rea file data ... start locglob_lexico: 8 640 5120 0.10000000000000001 locglob: 1 1 5120 locglob: 2 55 5120 locglob: 3 161 5120 locglob: 1 805 5120 locglob: 2 805 5120 locglob: 3 805 5120 locglob: 1 805 5120 locglob: 2 805 5120 locglob: 3 805 5120 1 2 4 Matrix: SELF!! 1 SELF!! 401 402 401 402 2 SELF!! 506 507 491 492 cont: SELF!! 1 ?? ABORT: SELF-CHK 1 5 1 0 Try to tighten the mesh tolerance! 0 quit ========================================== so does anyone know how to solve it or use some third party tools? thanks Alberto.