Rhinos are considered stubborn and inflexible. Rhino is clearly the exception. The bidirectional interface RFEM 6 - Rhino allows you to transfer various line types as well as surfaces (plane, rotated surface, and NURBS).
Also the bidirectional Grasshopper interface allows you to export and import model data, load cases and combinations, and the loads themselves. Instead of volatility, you will find a stable connection that you cannot build on, but that allows you to plan ahead.
RFEM 6 Interfaces to Rhino & Grasshopper