[Gmsh] Error "Self intersecting surface mesh, computing intersections" depending of characteristic length cl

[PLAUSSU Jean-Raoul CNRS]

Hello,
I programmed a 3D geo file.
Gmsh can mesh it with big characteristic length cl=100, giving 686 triangles. That means there isn't any syntax error in my file.
But reducing the characteristic length cl to cl=1 in order to get more triangles, and then meshing the volume, Gmsh gives the following  error message:

Error   : Self intersecting surface mesh, computing intersections (this could take a while)
Info    : 1340 intersecting faces have been saved into 'intersect.pos'
Info    : Done meshing 3D (41.8395 s)
Info    : 32138 vertices 69669 elements
Error   : ------------------------------
Error   : Mesh generation error summary
Error   :     0 warnings
Error   :     1 error
Error   : Check the full log for details
Error   : ------------------------------

What could be the cause of this error?
How could I solve it?

Thanks and best regards,
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PLAUSSU-MONTEIL Jean-Raoul
LTM/CNRS
CEA/LETI/D2NT
17 Avenue des Martyrs
38054 Grenoble Cedex 9

e-mail: jean-raoul.plaussu at cea.fr<mailto:jean-raoul.plaussu at cea.fr>
tel: +33 (0)4 38 78 52 61
fax: +33 (0)4 38 78 58 92
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http://www.ltm-cnrs.com<http://www.ltm-cnrs.com/>
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