Nonlinear 2d structural analysis with component inside component failing

Hello,

I want to do a structural analysis with rotation (RFORCE).

My model is periodic with 60°, so I used SPC at the edge nodes with dof2 = 0.0 and a cylindric system.
(There is an hyperworks example for this, but I didnt find the tasks from the tutorial in the fem file)

What I added to the model:

• nonlinear material curve
• two materials / properties
• cylindrical system
• NLPARAM
• SPC for periodicity
• contact (with/without)

It is working without the red component, but with it the solver is failing.
Also I added contacts (slide & stick) between both components, but then other errors occure.

Do you have any ideas how to do it correctly? Mabye mesh the air inside the blue component?
Thanks a lot!