A user has created a Line body and a Surface body in DesignModeler and wants to connect them using shared topology. (No contact elements)
The function Tools > Form New Part creates a new multi-body part with the line body and surface body as components, but the nodes are not shared when attached into Simulation. Why?

Concept models (line bodies) do not share topology in the same way that solid bodies do.

To get these two bodies to share a vertex, create a vertex on the surface body such that it's new vertex is coincident to the vertex on the line body.
Then, when the model is transferred to Simulation, the vertices will combine into one. The easiest way to do this would be to imprint a line on the cylinder to create the vertex.

Example model for 9.0 is attached to this solution.

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