Can't get Room to solid centeroid, may be a bug?

Hello all good people!!!

I’m working with room’s and trying to get some geometry data, everything went ok until i get this strange result on a circular room with halve esfere as a roof.

The images explain.

If someone knews what’s happening I will appreciate.


Sorry wrong node connection image.
The error message is "Unable to get area, negative volume.
Sorry the node was badly connected, now the image mesage shows the real error.