How to solve Isaac sim joint problem

Hi guys,
Iam trying to upload my own 3D CAD Design (Fusion360).usdz into Isaac sim, I defined the rigid bodies of the design, ground plane, physics etc .

But when Iam trying to add joint Iam getting this error command,



also I Can not move the joint to center them in articulation between Two meshes, Issac define the physical space of the joint as he want.

I tried to edit the CAD and export it as .usd and tried with CAD.Step again.
I am getting “can not add joint into the body and it self”.

here I can move the joint in the physical space between the design part.

so how I can fix this physics error and move the joint between the meshes.

I want to define the joint correctly with the 1st case.
so I can move to the next step ( run the simulation with Ros2).

I tried with these.


any ideas…
and thank you