End Goal: To make a flexbody for MotionView
What I did?
Step 1: Import CAD (.stp) file in HyperWorks(Hypermesh Optistruct)
Step 2: Meshed the model ( Mesh -Tetra (size 100))
Step 3: Created RBE2 spiders (Model Tab - RBE2)
Step 4: Exported the Solver Deck (.fem file)
Step 5: Found out the id for the interface nodes by importing in old UI of Hypermesh (Panels - Tool -Numbers )
Step 6: Used Flexbody Prep of MotionView as shown in image below

Step 7: Got error

Step 8: Looked for possible solution and tried using PSOLID for CTETRA but couldn't find out the exact way.
Please help. I'm new to Hyperwork and Motionview.
Here are attached files.