<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hello everybody,<div class=""><br class=""></div><div class="">I created a *.stl surface mesh of an airfoil in a tunnel with blender and want to build the volume mesh with gmsh. I followed the instructions from here (<a href="http://fengl.org/2012/05/21/converting-stl-surface-mesh-to-volume-mesh-using-gmsh/" class="">Converting STL surface mesh to volume mesh using GMSH | Feng Li's Homepage (李冯)</a>). However I get the following error message:</div><div class=""><br class=""></div><div class=""><div class="">Info : -------------------------------------------------------</div><div class="">Info : Gmsh version : 2.9.3</div><div class="">Info : Build OS : MacOSX</div><div class="">Info : Build options : 64Bit Ann Bamg Bfgs Blas(VecLib) Blossom Chaco DIntegration Dlopen Fltk Gmm Jpeg(Fltk) Kbipack Lapack(VecLib) MathEx Med Mesh Metis Mmg3d Mpeg NativeFileChooser Netgen ONELAB ONELABMetamodel OpenCascade OpenGL OptHom PETSc Parser Plugins Png(Fltk) Post SLEPc Salome Solver Tetgen(1.5) Voro3D Zlib</div><div class="">Info : Build date : 20150418</div><div class="">Info : Build host : Christophes-Mac.local</div><div class="">Info : Packager : geuzaine</div><div class="">Info : Executable : /Applications/Gmsh.app/Contents/MacOS/gmsh</div><div class="">Info : Home directory : /Users/kateeisenhower/</div><div class="">Info : Launch date : Thu Jun 11 10:51:04 2015</div><div class="">Info : Command line : /Applications/Gmsh.app/Contents/MacOS/gmsh</div><div class="">Info : -------------------------------------------------------</div><div class="">Info : Reading '/Users/kateeisenhower/Documents/Blender/Daten/airfoil/airfoil.stl'...</div><div class="">Info : Mesh is in binary format</div><div class="">Info : 3402 facets in solid 0</div><div class="">Info : Done reading '/Users/kateeisenhower/Documents/Blender/Daten/airfoil/airfoil.stl'</div><div class="">Info : Meshing 1D...</div><div class="">Info : Done meshing 1D (0 s)</div><div class="">Info : Meshing 2D...</div><div class="">Info : Done meshing 2D (0.0172832 s)</div><div class="">Info : Meshing 3D...</div><div class="">Info : Delaunay Meshing 1 volumes with 1 connected components</div><div class="">Info : Meshing volume 3 (Delaunay)</div><div class="">Error : Self intersecting surface mesh, computing intersections (this could take a while)</div><div class="">Info : 13 intersecting faces have been saved into 'intersect.pos'</div><div class="">Error : Could not open file 'intersect.pos'</div><div class="">Info : Done meshing 3D (2.03814 s)</div><div class="">Info : 1701 vertices 3402 elements</div><div class="">Error : ------------------------------</div><div class="">Error : Mesh generation error summary</div><div class="">Error : 0 warnings</div><div class="">Error : 2 errors</div><div class="">Error : Check the full log for details</div><div class="">Error : ———————————————</div></div><div class=""><br class=""></div><div class="">I don’t know what I am doing wrong. I tested my geometry for watertightness, face orientation, double vertices, etc. and I think my stl is valid. I have attached the file if anybody wants to try.</div><div class=""><br class=""></div><div class="">Thanks in advance. I’d be happy for every help, comment…</div><div class=""><br class=""></div><div class="">Kate</div><div class=""></div></body></html>