Mass floor 2010

[amara]

After creating a mass a warning says:

"Mass contains both solid and mesh geometry. Mass floors, volume and surface areas may appear incorrect"

Then I can't create mass floors.

Is there something wrong I am doing?

Thanks

[amara]

No one has the answer to this??
I tried in no vein to get the mass floors...

Another thing which I found out: When editing mass elements fro revit 2009, the same 2009 menus appear (extrude, revolve, sweep ...) but you can't apply the new techniques(such as add patterns for example).
Now if we can use the previous menus for old masses, why not have the option to use them for creating new masses. I find the old technique much easier to create certain forms.