[Gmsh] Renumbering midside nodes on loading of msh file

[Mark Starnes]

Hi everyone,

First, thanks for the great software.  I've been using Gmsh for four
years now in favour of other commercial packages.  Please keep up the
good work!

Now for my problem:

With the script, 

$MeshFormat
2.1 0 8
$EndMeshFormat
$Nodes
6
1 0 1 0
2 0 0 0
3 1 0 0
4 0 0.5 0
5 0.5 0 0
6 0.5 0.5 0
$EndNodes
$Elements
1
11 9 3 39 93 0 1 2 3 4 5 6
$EndElements

loading on gmsh version 2.3.0 works as expected, with midside nodes
agreeing with the script above.  

However, with my copy of Versions 2.3.1 and 2.4.2, on loading, the
Message Console shows gmsh has remeshed the element (without my
requesting it) and the midside
node numbers have changed.  Saving the default options with the two
cases generates identical option files, and I can't
find a way to prevent the newer gmsh versions re-meshing on load.

Trying the same experiment with a fresh installation of 2.4.2 under
windows works as hoped.


Can anybody help?  Is there a configuration file I'm unaware of?

Best regards,

Mark. 
  
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