[Gmsh] Cannot mesh a simple volume

[Fabrice Pepin]

Hello,
I try to mesh a simple box volume using version 2.16 without success and I do not understand why.Everything is fine up to 2D mesh. I want to have 4 hexa "piled" together.Picture 1 shows quadrangles (with shrink factor) which are OK.On the GUI I click on mesh 3D and then the quadrangles are split and 3D mesh gets error.Can anybody tell me what I do wrong ? Thank you in advance.
Fabrice.

// hexa elements
// 4 along length , 1 along width z, 1 along height y
size = 480/4;
Point (1) = {0, 0, 0, size};
Point (2) = {0, 0, 30, size};
Line (1) = {1, 2};
Extrude {0, 30, 0} { Line{1}; Layers {{1}, {1} }; }
Transfinite Surface {5} Right;
Extrude {480, 0, 0} { Surface{5}; Layers { {1, 1, 1, 1}, {0.25, 0.5, 0.75, 1} } ;}
Transfinite Line "*" = 2;
Transfinite Surface "*" Right;
Recombine Surface "*" =0 ;
Transfinite Volume "*" ;
Mesh 1;
Mesh 2;


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