[Gmsh] gmsh 2.0.8 aborts or segfaults
Christophe Geuzaine
cgeuzaine at ulg.ac.be
Tue Oct 30 19:30:15 CET 2007
Hi Werner - After a quick investigation it seems that the problem is
twofold:
(1) some points in your file are very close to each other (almost
identical): this leads to the creation of extremely "thin" surfaces in
the extrusion, which in turns makes the 2D and 3D mesh algorithms unhappy
(2) your file also seems to trigger a weird bug in our code (the "Weird
point" message)
Could you regenerate a .geo file that fixes (1)? Then we could
investigate (2) in more detail.
Christophe
magpar wrote:
> Hello again,
>
> Just a quick follow-up on the problem reported previously:
>
> The second geo file attached to the previous email, which shows the
> problems, has a bunch of distorted volumes, which show up when rendering
> the geo file in gmsh. Usually my scripts remove these volumes and they
> do not appear to cause the segfault problems.
>
> Attached another example, which causes gmsh to segfault. This time
> without the distorted volumes.
>
> When opening this geo file with gmsh in the graphical user interface,
> gmsh throws these errors:
>
> gmsh media_p03.geo
>
> Info : Reading 'media_p03.geo'
> Error : Weird point 554 in Coherence
> Error : Weird point 554 in Coherence
> Error : Weird point 510 in Coherence
> Error : Weird point 510 in Coherence
> Error : Weird point 510 in Coherence
> [...]
>
> However, gmsh does display a reasonable geometry.
>
> Meshing leads to the segfault:
>
> gmsh -3 media_p03.geo
> (Mesh.Algorithm3D=4;)
>
> Info : 16 points, 23 elements
> Info : Meshing volume 23 (Netgen)
> Fatal : Segmentation violation (invalid memory reference)
>
> gmsh -3 media_p03.geo
> (Mesh.Algorithm3D=1;)
>
> Info : Meshing volume 473 (Delaunay)
> Info : Meshing volume 474 (Delaunay)
> Fatal : Segmentation violation (invalid memory reference)
>
>
> Thanks in advance for any help.
>
>
> Werner
>
>
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--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine