Rigid Body Motion in Contact Detection Region Error

Is it possible to have a Fluent rigid body move in and out of a contact detection region with a porous definition? Independently both appear to work fine. 

Errors occur after introducing movement within or into/out of a contact detection region. The models will be used in analyzing different valve geometries in motion. I'm thinking the use of contact detection will allow for porous zones that are only active when specified regions are in close proximity to each other, like when the valve is closed.

Tutorials or references on this topic seems sparse. Suggestions or references would be appreciated.

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