Help! Karamba 3D rigid body

Hi everyone,
I’m new in using grasshopper and karamba. I try to determine a structure stabilitybut I get the message : “1. There are 302 rigid body modes in the system. This means some parts can move freely without causing deformation.
Try to use the ‘Eigen Modes’-component and activate the display of local coordinate axes: The first eigen-mode will be the rigid body motion.
If this does not help, check whether you have a pinned support directly attached to a hinge. A hinge introduces an extra node which may cause the problem.
When analyzing a flat shell structure one has to lock the rotation perpendicular to the plate in at least one node.”
I don’t really kow what to do.
Can someone help me

Here are some updated versions (48.4 KB)
bridge.3dm (810.9 KB)

Now I have 17 rigid body