[Gmsh] 8 node quads mesh

[Mikhail Artemyev]

Hello,

If you look at the mesh file you'll see lines like this describing an 
element

1 16 0 99 2    7   65   66  399  318  489   63   64

Comparing it with the .msh ASCII format 
(http://gmsh.info/doc/texinfo/gmsh.html#MSH-ASCII-file-format), you'll 
see that the third number describes the number of tags. Since it's 0, 
the next number is considered to be a start of sequence on nodes, and 
you get an error. My guess is that 0 and 2 are accidentally swapped in 
that software you use, because obviously there are 2 tags followed by 8 
nodes.

Best regards,
Mikhail



On 07/05/2016 05:01 AM, gmsh-request at ace20.montefiore.ulg.ac.be wrote:
> Send gmsh mailing list submissions to
> 	gmsh at onelab.info
>
> To subscribe or unsubscribe via the World Wide Web, visit
> 	http://onelab.info/mailman/listinfo/gmsh
> or, via email, send a message with subject or body 'help' to
> 	gmsh-request at onelab.info
>
> You can reach the person managing the list at
> 	gmsh-owner at onelab.info
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of gmsh digest..."
>
>
> Today's Topics:
>
>     1. 8 node quads mesh (tshering lhamo)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 5 Jul 2016 10:48:27 +0200
> From: tshering lhamo <tsheringlhamo88 at gmail.com>
> To: gmsh at onelab.info
> Subject: [Gmsh] 8 node quads mesh
> Message-ID:
> 	<CAHgAoVPm0+r4CYx0U0QgVxNf_hKa_cKQOebvoxUWCyrBvYq6aw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hello,
>
> I have a .LAG file generated from Lagamine (which using Matlab was used to
> generate a mesh file to be opened with GMSH) . The mesh has 8 node
> quadrilaterals. Whenever I try to open with GMSH, it says Vertex Index
> Error.
> I would like to attach the file here. I was wondering if there was a way
> check to why the error.
> Thank you so much.
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <http://onelab.info/pipermail/gmsh/attachments/20160705/3ff83291/attachment.html>
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: TEST.msh
> Type: model/mesh
> Size: 74377 bytes
> Desc: not available
> URL: <http://onelab.info/pipermail/gmsh/attachments/20160705/3ff83291/attachment.msh>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> gmsh mailing list
> gmsh at onelab.info
> http://onelab.info/mailman/listinfo/gmsh
>
>
> ------------------------------
>
> End of gmsh Digest, Vol 162, Issue 3
> ************************************