Ansys Employee

The dirty workflow is still being worked on, so it may be working better in R3.  If you are using that approach I think it still uses the wrapper somewhere to seal the volume. If you leave the workflow and look in the tree can you see any issues? 

As an aside, I assume you're using Fluent Meshing in standalone mode? It's not really designed for use within Workbench so that can also cause a few issues at present.