[Gmsh] Question

[Josef Novák]

Hello,
I have a problem with mesh generating. I have simple *.geo file:

Point(1) = {0, 0, 0, 0.5};
Point(2) = {1, 0, 0, 0.5};
Point(3) = {2, 0, 0, 0.5};
Line (1) = {1, 2};
Line (2) = {2, 3};
Extrude Line {1, {0,1,0}};
Extrude Line {2, {0,1,0}};
Line Loop(11) = {-3,-4,1,5};
Plane Surface(12) = {11};
Line Loop(13) = {7,-9,-2,5};
Plane Surface(14) = {13};
Physical Surface(15) = {12,14};

When I use triangle isotropic algorithm, it makes this *.msh file:

$NOD
10
1 0 0 0
2 1 0 0
3 2 0 0
4 0 1 0
5 1 1 0
7 2 1 0
8 0.5 0.5 0
9 1.5 0.5 0
10 0.5 0.5 0
11 1.5 0.5 0
$ENDNOD
$ELM
8
1 2 15 12 3 2 1 10
2 2 15 12 3 10 5 2
3 2 15 12 3 4 5 10
4 2 15 12 3 1 4 10
5 2 15 14 3 3 2 11
6 2 15 14 3 11 7 3
7 2 15 14 3 5 7 11
8 2 15 14 3 2 5 11
$ENDELM

It generates multiple points - 8 resp. 10, 9 resp. 11.
I am using version 1.44 on Slackware 9.0. I tryied delete .gmshrc and 
.gmsh-options, but it didn't help.

Thanks for help

-- 
Josef Novak
Katedra modelovani procesu
Fakulta mechatroniky a mezioborovych inzenyrskych studii, 
Technicka univerzita v Liberci
Halkova 6, 461 17 Liberec

tel: +420 485 353 566
e-mail: josef.novak at vslib.cz
URL: http://www.fm.vslib.cz/~kmo/czech/clen.php?id=19