Surface 3 is not an exterior face of a 3-D Region.
 

Could you advice me how to create an internal wall to use for cfx5.6?? Internal wall will be used to transfer heat only.

AR

Surface is closed and also contains singularity
 

There is an error I find in BUILD (cfx 5.6)

"Surface is closed and also contains singularity"

Any idea why I get this?

Re: Surface is closed and also contains singularit
 

You have created a cone-like surface in your geometry. You need to split the cone into two surfaces from the point to the base in order to mesh it.