[Gmsh] Cylindrical model with embedded points (could not find extruded vertex)

[Florian M. Wagner]

Dear gmsh users,

I'd like to set up a cylindrical model consisting of triangular prism 
elements, regularly layered in z-direction (using the extrude function). 
That has worked fine so far, but as soon as I want to embed particular 
points in the mesh, the following error message appears:

/Error: Could not find extruded vertex.../

I tried to translate the points to all layers and recombine them with 
the extruded surfaces, but that did not work and there must be a better way.

I highly appreciate your help.
Attached you find the .geo-file and two screenshots showing the result 
without the desired embedded points.

Kind regards,

Florian Wagner
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