Fluent meshing: intentional voids removed
 

I was recommended to use the new watertight workflow meshing available in Fluent Meshing.

I imported my model from DesignModeler, which has intentional void regions representing the turbine blades, however following the steps through Fluent Meshing removes these void regions when creating the surface mesh and the blades disappears from the boundary list,

Has anyone else had similar experience and knows how to solve this?

Thanks,
Sean