Meshing a cutted Cylinder

Dear All,

I need to mesh a long (20m+) cylinder of very small diameter (20 mm) ( a rod). The best way to reduce the nº of elements is to use quad external face from 3d extrusion with top (or bottom) face with a sub mesh of mefisto triangles and the opposite face with a projection of the top.

This works fine if the cylinder is generated and meshed, but if I cut the cylinder with a plane, cylinder or sphere is impossible to carry out as the face of the cut is not recognised and the process fails.

If I do the same with a box, cutting the box with any thing it works fine.

Is this a bug or do I miss something?

Attached is the script that makes two cylinders and cut them.

The meshing in this script, apparently the projection works making the top face with the same number of vertices and edges, still the extrusion 3d fails. I get: OCC exception. OSD_SIGSEGV: SIGSEGV 'segmentation violation' detected. Address 14

If I mesh independently the top and bottom with the same number of segments, lets say 10, the top gives 10 but the bottom 20.



Thanks again for your attention.

Carlos.