<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br class=""><br class=""><blockquote type="cite" class="">On 28 Apr 2020, at 13:36, Michael Enders <<a href="mailto:Michael.Enders@icfo.eu" class="">Michael.Enders@icfo.eu</a>> wrote:<br class=""><br class="">Yes, of course.<br class=""></blockquote><div class=""><br class=""></div><div class="">Your mesh size specification (or lack thereof) leads to a very coarse surface mesh, which has overlapping edges. Simply adjust the mesh sizes to have something reasonable, e.g. by adapting the mesh size to the curvature:</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="7F7AE9CE-C229-4B61-8FD2-59545918F272" width="500" height="345.5" src="cid:9A0D3AB4-D85C-407A-AEE6-6B58BD8D6513@home" class=""></div><div class=""><br class=""></div><div class="">Cheers,</div><div class=""><br class=""></div><div class="">Christophe</div><div class=""><br class=""></div><div class=""><br class=""></div><br class=""><blockquote type="cite" class="">From: Christophe Geuzaine <<a href="mailto:cgeuzaine@uliege.be" class="">cgeuzaine@uliege.be</a>><br class="">Sent: 28 April 2020 13:34<br class="">To: Michael Enders <Michael.Enders@icfo.eu><br class="">Cc: gmsh@onelab.info <gmsh@onelab.info><br class="">Subject: Re: [Gmsh] Problem meshing imported STEP file<br class=""> <br class=""><br class=""><br class="">> On 28 Apr 2020, at 12:20, Michael Enders <Michael.Enders@icfo.eu> wrote:<br class="">> <br class="">> Hello everyone,<br class="">> <br class="">> I would like to mesh a .STEP file (a picture is attached). But just running <br class="">> <br class="">> Merge "part.STEP";<br class="">> Mesh 3;<br class="">> <br class="">> gives me the following errors:<br class="">> <br class="">> Error : No tetrahedra in region 1<br class="">> Info : 3D refinement terminated (274 nodes total):<br class="">> Info : - 0 Delaunay cavities modified for star shapeness<br class="">> Info : - 0 nodes could not be inserted<br class="">> Info : - 0 tetrahedra created in 0.000178 sec. (0 tets/s)<br class="">> Error : No elements in volume 1 <br class="">> <br class="">> I tried to define new volumes and I managed to mesh some parts of the object, but I was never able to mesh everything. Do you have some ideas what I could do?<br class="">> <br class=""><br class="">Can you send the .step file ?<br class=""><br class="">Christophe<br class=""><br class="">> Thanks,<br class="">> Michael<br class="">> <imported_step_file.png>_______________________________________________<br class="">> gmsh mailing list<br class="">> gmsh@onelab.info<br class="">> http://onelab.info/mailman/listinfo/gmsh<br class=""><br class="">— <br class="">Prof. Christophe Geuzaine<br class="">University of Liege, Electrical Engineering and Computer Science <br class="">http://www.montefiore.ulg.ac.be/~geuzaine<br class=""><br class=""><br class=""><br class=""><span id="cid:2A632071-E599-4581-B92F-D5A1D43CA724@home"><part.STEP></span><br class=""></blockquote><br class=""><div class="">— <br class="">Prof. Christophe Geuzaine<br class="">University of Liege, Electrical Engineering and Computer Science <br class=""><a href="http://www.montefiore.ulg.ac.be/~geuzaine" class="">http://www.montefiore.ulg.ac.be/~geuzaine</a><br class=""><br class=""><br class=""></div><br class=""></body></html>