Hi Ram, 

I have tried versy simplistic BCs (very small displacement to an edge) and still getting the errors. 

The problem is that after my first simulation my geometry consists of 60 line bodies, 60 edges, 120 Verticies. When I transfer this to my second simulation, my geometry consists of one line body, 422 edges, 422 vertices.

I think something is happening during the transfer. 

Also cross sections don’t transfer with dynain. So I’m creating a circular cross section in the second simulation.