NetGen CSG extrusion

General
1

Hi,

I create an extrusion based on a set of line, however NetGen is hangs when the geo files opened.

Probably i miss something, but have no ideas.

Any hints about the problems? Thanks in advance

algebraic3d

curve2d procurve1=(4;
	0.0,0.0;
	100.0,0.0;
	100.0,100.0;
	0.0,100.0;
	4;
	2,1,2;
	2,2,3;
	2,3,4;
	2,4,1);

curve3d pathcurve1=(2;
	0.0,0.0,0.0;
	0.0,0.0,150.0;
	1;
	2,1,2);

solid ext = extrusion(pathcurve1;procurve1;0,0,1);

tlo ext;