Non Linear Sunmodelling - Limitations on Model type

Hi,

I'm trying to do some sub modelling in non linear analysis to look at a stress concentration. I use a material with Von Mises plasticity for the whole model. That works fine. I then sub model the region of interest but SW changes to the material to linear Elastic Isotropic. No matter what I do it won't change to a plasticity model. In fact the only model type it accepts is linear isotropic.

Have I missed something or is SW just being rubbish?

Yours frustratedly etc...

SolidworksSimulation