[Gmsh] Symmetry on Layered Surface at meshing time question

[jean pierre aubry]

hello

when i do 
edge1s[]  = { Extrude {0, t1, 0} {Line{6, -4, -5, -7};Layers {3};} };
followed by
symedge1s[] = {
	Symmetry {0, 1, 0, 0}
	{Duplicata { Surface{edge1s[]}; } }
};
and meshes
the surfaces edges1s[] are correctly meshed with 3 elements along the
length t1 
symedge1s[] does not show a symmetric mesh, element size
follows the characteristic length at point as defined

this is what is described in the manual regarding symmetry

but

is there a way to apply symmetry to the the meshing "seed" defined in
the Extrude command?

jean pierre aubry