Hello every one, using this tutorial with my OF 2.1 i've got the following issue once i executed the "snappyHexMesh -overwrite"
if you know how to solve it, please help me.

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0

Read mesh in = 1.234 s

Overall mesh bounding box  : (-0.03 -0.03 -0.03) (0.03 0.03 0.01)
Relative tolerance         : 1e-006
Absolute matching distance : 9.38083e-008

Reading refinement surfaces.
Read refinement surfaces in = 0.204 s

Reading refinement shells.
Refinement level 3 for all cells inside refineHole
Read refinement shells in = 0 s

Setting refinement level of surface to be consistent with shells.
Checked shell refinement in = 0.125 s

Reading features.
Refinement level 0 for all cells crossed by feature "flange.eMesh" (767 points,
776 edges).
Detected 18 featurePoints out of 767 on feature flange.eMesh
Read features in = 0.031 s


Determining initial surface intersections
-----------------------------------------



--> FOAM FATAL ERROR:
Number of cells in mesh:8000 does not equal size of cellLevel:35656
This might be because of a restart with inconsistent cellLevel.

    From function hexRef8::getLevel0EdgeLength() const
    in file polyTopoChange/polyTopoChange/hexRef8.C at line 357.

FOAM aborting