[Gmsh] something wrong in edge loop after extrude a line or a surface

Christophe Geuzaine cgeuzaine at ulg.ac.be
Tue Oct 5 13:16:45 CEST 2010

On 05/10/10 12:45, Paulo at gmx wrote:
> Hello at all,
> I started to model a volume by starting defining points, lines and
> surfaces. Now I want to create my volume by extruding surfaces or lines.
> If I do this by clicking the commands in the gmsh dialog it works
> perfect. But if I choice geometry reload or reopening the geo file I got
> all times the error message that there is "something wrong in edge loop"!
> The geometry crashes if the command:
> Extrude {0, 0, 10e-3} {
> Line{2};
> }
> will be stay in the geo file. The line 2 will be extruded but I miss
> other lines, which were created before the extruded lines?!? So my
> question is, what I'm doing wrong?

What's the overall size (dimension) of your model? You might be hitting 
the default geometrical tolerance. If that's the case, you can change it 
w.g. with "Geometry.Tolerance = 1.e-12;" (by default it's 1e-6)

> Thanks in advance and best regards
> pajofego
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science