smooth surface

Coreform Cubit Meshing
#1

Hi,
How can I resolve this message when I make smooth on surface :

Trelis> surface 1 smooth scheme laplacian free
Journaled Command: surface 1 smooth scheme laplacian free

Trelis> smooth surface 1
Smoothing of Surface 1 (surface 1) complete

ERROR: >>>>Negative Jacobian Face Generated!<<<<
Check Surface 1 Mesh Quality.

Journaled Command: smooth surface 1

Thanks.

#2

The Mesh-Volume-Smoothing Operations will help resolve negative Jacobians. Or, you may want to decompose the model into more cubic volumes.