Hi Francesco, After FreeCAD upstream pointed into this direction: "2606" seems not to be a "release", it has been only tagged upstream, but it is not showing up as a release. Maybe 2606 isn't intended as a release, maybe upstream changed how they release, I don't know, just wanted to add this observation...
Still no urgency; (I've disabled netgen usage in FreeCAD for the moment.) -- tobi

