hybrid mesh/Aligning tet with hex mesh
 

Hi,

I am currently trying to make a hybrid mesh, and trying to keep the tet cells aligned with hex mesh by using the option of:
"use existing mesh" in octree algorithm.

Though i get a aligned tet mesh( two tri for each quad face) in many places i face a problem as two tria are formed for two quad faces.

how can i get to avoid this prob.