Geometry shader lines-input not working...?

geom3-Dat use lines as input for the GeomtryShader (Input primitive type is set to lines), but
doesn’t work…
Why??

How do to use lines as input for GS??
GeomShader.5.toe (4.57 KB)

I have not the time now to analyze all your proposition but in your geometry shader, you must write:
EndPrimitive();
after
EmitVertex();