OBD U7 - Convert PS elements to DWG

Hi,

What's the procedure for converting PS element in OBD U7 to native solids so that the model can be exported to dwg? In PS, there's an option to convert PS elements to "native solid", below is procedure to convert PS model to DWG. 

https://communities.bentley.com/products/prostructures/w/structural_drafting_and_detailing__wiki/41448/save-as-dwg-is-not-converting-solid-model-in-connect-edition

Looking at the help topic for the same matter, I assume the instructions in there are only valid "legacy" (triforma) structural members:

https://docs.bentley.com/LiveContent/web/OpenBuildings%20Designer%20Help-v3/en/GUID-2EB856A4-33A6-8C9B-D56F-AE012F639A99.html

Best regards,

Tuan Le