surface selection from Void Fill

[Anonymous]

I am wondering how to activate "Surface" selection as attachment.

I need to create fluid volume using "Void Fill".

Fluid boundary surfaces are already created from solid modeler (Inventor).

So now, I need to select those pre-exist surface to fill the void but I was not able to select Surface from the radio button. 

How can I activate it??

[Anonymous]

If you've modeled it with boundary surfaces, why dont you do the last step in Inventor, stiching them together to a solid?!

Even better is maybe to model the enclose as "watertight" solid and you will get the fluid volume automatically.

The CFD geometry tool is dedicated to pick edges and create surfaces, it cannot be activated like you want it to.

Marco