[Gmsh] segmentation fault when opening a .igs file

[Christophe Geuzaine]

On 14/10/10 19:24, Louis Gagnon wrote:
> Hello,
>
> I am trying to import a IGES file and gmsh cannot open it. The only output I see in terminal is a segmentation fault.
>
> Are there any tricks to remove the error and import the file?

Hi Louis - as a general rule, try to use .step instead of .iges if 
possible. We use OpenCascade's IGES import, which is far from robust.

Have you tried changing the geometrical tolerance and/or deactivating 
the model cleaning options (Tools->Geometry->General)?

>
> Here is the header part of the .igs file:
>
>                                                                          S      1
>
> /COM,ANSYS RELEASE 10.0    UP20050718       11:16:44    11/05/2007      S      2
>
> /NOPR                                                                   S      3
>
> /PREP7                                                                  S      4
>
> /TITLE,                                                                 S      5
>
> BFUNIF,TEMP,_TINY                                                       S      6
>
> KUSE,0                                                                  S      7
>
> TIME,0.00000000                                                         S      8
>
> TREF,0.00000000                                                         S      9
>
> ALPHAD,0.00000000                                                       S     10
>
> BETAD,0.00000000                                                        S     11
>
> DMPRAT,0.00000000                                                       S     12
>
> CRPLIM,0.100000000,0                                                    S     13
>
> CRPLIM,0.00000000,1                                                     S     14
>
> NCNV,1,0.00000000,0,0.00000000,0.00000000                               S     15
>
> NEQIT,0                                                                 S     16
>
> ERESX,DEFA                                                              S     17
>
> ACEL,0.00000000,0.00000000,0.00000000                                   S     18
>
> OMEGA,0.00000000,0.00000000,0.00000000,0                                S     19
>
> DOMEGA,0.00000000,0.00000000,0.00000000                                 S     20
>
> CGLOC,0.00000000,0.00000000,0.00000000                                  S     21
>
> CGOMEGA,0.00000000,0.00000000,0.00000000                                S     22
>
> DCGOMG,0.00000000,0.00000000,0.00000000                                 S     23
>
> IRLF,0                                                                  S     24
>
> !set_flag_to_prevent_offset_when_importing_FE_model.                    S     25
>
> _CDRDOFF=1                                                              S     26
>
> /AUX15                                                                  S     27
>
> IOPTN,YES,DEFA                                                          S     28
>
> /GOPR                                                                   S     29
>
> !_END_OF_START                                                          S     30
>
> 1H,,1H;,,16Htucknov0507.iges,                                           G      1
>
> 5HANSYS,22H  10.0      UP20050718,,,,,,,1.0,,,,,13H001105.111644,       G      2
>
> 1.0000E-04,,,,9,,;                                                      G      3
>
>       128       1       0       0       0       0       0       000010001D      1
>
>       128       0       0      51       0       0       0 SURFACE       0D      2
>
>       126      52       0       0       0       0       0       000010501D      3
>
>       126       0       0       7       0       0       0B-SPLINE       0D      4
>
>       126      59       0       0       0       0       0       000010501D      5
>
>       126       0       0      23       0       0       0B-SPLINE       0D      6
>
>       126      82       0       0       0       0       0       000010501D      7
>
>
>
>
>
> Thank you,
>
>
> -Louis
>
>
>
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>


-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine