@netsonic_Sofistik solids are not directly supported by the SOFiSTiK Rhino interface.
As Martin said, you have to use a TEDDY input.
For more information, please visit our online documentary:
https://www.sofistik.de/documentation/2022/en/rhino_interface/modeling_hints.html#geometry-entities-and-structural-elements
A list of the supported items can be found here:
https://www.sofistik.de/documentation/2022/en/rhino_interface/structural_elements.html
Best regards
Frederik Höller
Your SOFiSTiK Support Team