[Allen_Huang]

Here is my snappyHexMesh code:
...

/* refinementBox
{
type searchableBox;
min (-1 -1 -1);
max ( 5 1 1);
} */
};

....

refinementSurfaces
{
wing
{

level (2 2);
}
}


resolveFeatureAngle 30;

...

refinementRegions
{
wing
{
mode distance;

levels ((0.1 4));
}


}


locationInMesh (-0.4 0 0);


allowFreeStandingZoneFaces true;
}


snapControls
{

nSmoothPatch 3;


tolerance 4.0;


nSolveIter 30;

nRelaxIter 5;
}


addLayersControls
{
relativeSizes false;


layers
{
wing
{
nSurfaceLayers 6;
}
}


expansionRatio 1.2;

finalLayerThickness 0.5;

minThickness 0.1;

nGrow 0;

featureAngle 130;


nRelaxIter 5;


nSmoothSurfaceNormals 1;


nSmoothNormals 3;


nSmoothThickness 10;

maxFaceThicknessRatio 0.5;

maxThicknessToMedialRatio 0.3;


minMedialAxisAngle 90;


nBufferCellsNoExtrude 0;

nLayerIter 50;
}

meshQualityControls
{

maxNonOrtho 65;


maxBoundarySkewness 20;
maxInternalSkewness 4;


maxConcave 80;

minVol 1e-13;


minTetQuality 1e-30;

//- Minimum face area. Set to <0 to disable.
minArea -1;

//- Minimum face twist. Set to <-1 to disable. dot product of face normal
// and face centre triangles normal
minTwist 0.05;

//- Minimum normalised cell determinant
// 1 = hex, <= 0 = folded or flattened illegal cell
minDeterminant 0.001;

//- minFaceWeight (0 -> 0.5)
minFaceWeight 0.05;

//- minVolRatio (0 -> 1)
minVolRatio 0.01;

//must be >0 for Fluent compatibility
minTriangleTwist -1;

// Advanced

//- Number of error distribution iterations
nSmoothScale 4;
//- Amount to scale back displacement at error points
errorReduction 0.75;
}

// Advanced

// Merge tolerance. Is fraction of overall bounding box of initial mesh.
// Note: the write tolerance needs to be higher than this.
mergeTolerance 1e-6;

// ************************************************** *********************** //
and it showes
Detected 319 illegal faces (concave, zero area or negative cell pyramid volume)
Extruding 0 out of 5226 faces (0%). Removed extrusion at 0 faces.
Added 0 out of 31356 cells (0%).

Doing final balancing
---------------------

[0] [stack trace]
[0] =============
[1] [stack trace]
[1] =============
[1] #1 Foam::sigSegv::sigHandler(int)[0] #1 Foam::sigSegv::sigHandler(int)[2] [stack trace]
[2] =============
[3] [stack trace]
[3] =============
[2] #1 Foam::sigSegv::sigHandler(int)[3] #1 Foam::sigSegv::sigHandler(int) in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so
[2] #2 ? in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so
[3] #2 ? in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so
[1] # in 2 ?/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libOpenFOAM.so
[0] #2 ? in /lib/x86_64-linux-gnu/libpthread.so.0
in /lib/x86_64-linux-gnu/libpthread.so.0
in /lib/x86_64-linux-gnu/libpthread.so.0
in /lib/x86_64-linux-gnu/libpthread.so.0
[2] #3 Foam::List<int> Foam::mapDistributeBase::accessAndFlip<int, Foam::flipOp>(Foam::UList<int> const&, Foam::UList<int> const&, bool, Foam::flipOp const&)[1] #3 Foam::List<int> Foam::mapDistributeBase::accessAndFlip<int, Foam::flipOp>(Foam::UList<int> const&, Foam::UList<int> const&, bool, Foam::flipOp const&)[0] #3 [3] #3 Foam::List<int> Foam::mapDistributeBase::accessAndFlip<int, Foam::flipOp>(Foam::UList<int> const&, Foam::UList<int> const&, bool, Foam::flipOp const&)Foam::List<int> Foam::mapDistributeBase::accessAndFlip<int, Foam::flipOp>(Foam::UList<int> const&, Foam::UList<int> const&, bool, Foam::flipOp const&) in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
[1] #4 void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<Foam::Pair<int> > const&, int, Foam::List<Foam::List<int> > const&, bool, Foam::List<Foam::List<int> > const&, bool, Foam::List<int>&, Foam::flipOp const&, int, int)[2] #4 void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<Foam::Pair<int> > const&, int, Foam::List<Foam::List<int> > const&, bool, Foam::List<Foam::List<int> > const&, bool, Foam::List<int>&, Foam::flipOp const&, int, int)[0] #4 void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<Foam::Pair<int> > const&, int, Foam::List<Foam::List<int> > const&, bool, Foam::List<Foam::List<int> > const&, bool, Foam::List<int>&, Foam::flipOp const&, int, int)[3] #4 void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<Foam::Pair<int> > const&, int, Foam::List<Foam::List<int> > const&, bool, Foam::List<Foam::List<int> > const&, bool, Foam::List<int>&, Foam::flipOp const&, int, int) in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
in [2] #5 /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so
void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<int>&, Foam::flipOp const&, int) const[1] #5 void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<int>&, Foam::flipOp const&, int) const[3] #5 void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<int>&, Foam::flipOp const&, int) const[0] #5 void Foam::mapDistributeBase::distribute<int, Foam::flipOp>(Foam::UPstream::commsTypes, Foam::List<int>&, Foam::flipOp const&, int) const in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so
in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so
[3] #6 in in Foam::snappyLayerDriver::addLayers(Foam::layerPara meters const&, Foam::dictionary const&, Foam::List<int> const&, int, Foam::decompositionMethod&, Foam::fvMeshDistribute&)/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so
/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so
[0] #6 Foam::snappyLayerDriver::addLayers(Foam::layerPara meters const&, Foam::dictionary const&, Foam::List<int> const&, int, Foam::decompositionMethod&, Foam::fvMeshDistribute&)[1] #6 Foam::snappyLayerDriver::addLayers(Foam::layerPara meters const&, Foam::dictionary const&, Foam::List<int> const&, int, Foam::decompositionMethod&, Foam::fvMeshDistribute&)[2] #6 Foam::snappyLayerDriver::addLayers(Foam::layerPara meters const&, Foam::dictionary const&, Foam::List<int> const&, int, Foam::decompositionMethod&, Foam::fvMeshDistribute&) in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
[3] #7 Foam::snappyLayerDriver::doLayers(Foam::dictionary const&, Foam::dictionary const&, Foam::layerParameters const&, Foam::meshRefinement::FaceMergeType, bool, Foam::decompositionMethod&, Foam::fvMeshDistribute&) in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
[0] #7 Foam::snappyLayerDriver::doLayers(Foam::dictionary const&, Foam::dictionary const&, Foam::layerParameters const&, Foam::meshRefinement::FaceMergeType, bool, Foam::decompositionMethod&, Foam::fvMeshDistribute&)[2] #7 Foam::snappyLayerDriver::doLayers(Foam::dictionary const&, Foam::dictionary const&, Foam::layerParameters const&, Foam::meshRefinement::FaceMergeType, bool, Foam::decompositionMethod&, Foam::fvMeshDistribute&) in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
[1] #7 Foam::snappyLayerDriver::doLayers(Foam::dictionary const&, Foam::dictionary const&, Foam::layerParameters const&, Foam::meshRefinement::FaceMergeType, bool, Foam::decompositionMethod&, Foam::fvMeshDistribute&) in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
[3] # in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
in 8 /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
[1] #8[2] #8 in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so
[0] #8 ???? in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[3] #9 __libc_start_main in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[0] #9 in __libc_start_main/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[2] #9 __libc_start_main in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[1] #9 __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
[3] #10 in /lib/x86_64-linux-gnu/libc.so.6
in [1] #10 /lib/x86_64-linux-gnu/libc.so.6
in /lib/x86_64-linux-gnu/libc.so.6
[0] #10 [2] #10 ???? in /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[3] =============
[ailab07:20475] *** Process received signal ***
[ailab07:20475] Signal: Segmentation fault (11)
[ailab07:20475] Signal code: (-6)
[ailab07:20475] Failing at address: 0x3e800004ffb
[ailab07:20475] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f96ff7c8420]
[ailab07:20475] in in [ 1] /lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb)[0x7f96ff7c82ab]
[ailab07:20475] [ 2] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[1] =============
/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[0] =============
/lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f96ff7c8420]
[ailab07:20475] [ 3] in [ailab07:20472] *** Process received signal ***
[ailab07:20472] Signal: Segmentation fault (11)
[ailab07:20472] Signal code: (-6)
[ailab07:20472] Failing at address: 0x3e800004ff8
[ailab07:20473] *** Process received signal ***
[ailab07:20473] Signal: Segmentation fault (11)
[ailab07:20473] Signal code: (-6)
[ailab07:20473] Failing at address: 0x3e800004ff9
/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/bin/snappyHexMesh
[2] =============
[ailab07:20473] [ 0] [ailab07:20472] [ 0] [ailab07:20474] *** Process received signal ***
/lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f948cd96420]
[ailab07:20472] [ 1] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f045509a420]
[ailab07:20473] [ 1] [ailab07:20474] Signal: Segmentation fault (11)
[ailab07:20474] Signal code: (-6)
[ailab07:20474] Failing at address: 0x3e800004ffa
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb)[0x7f045509a2ab]
[ailab07:20473] [ 2] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f045509a420]
[ailab07:20473] [ 3] /lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb)[0x7f948cd962ab]
[ailab07:20472] [ 2] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f948cd96420]
[ailab07:20472] [ 3] [ailab07:20474] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7fb58072a420]
[ailab07:20474] [ 1] /lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb)[0x7fb58072a2ab]
[ailab07:20474] [ 2] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7fb58072a420]
[ailab07:20474] [ 3] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase13ac cessAndFlipIiNS_6flipOpEEENS_4ListIT_EERKNS_5UList IS4_EERKNS6_IiEEbRKT0_+0xa4)[0x7f04581f56e4]
[ailab07:20473] [ 4] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase13ac cessAndFlipIiNS_6flipOpEEENS_4ListIT_EERKNS_5UList IS4_EERKNS6_IiEEbRKT0_+0xa4)[0x7f948fef16e4]
[ailab07:20472] [ 4] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase13ac cessAndFlipIiNS_6flipOpEEENS_4ListIT_EERKNS_5UList IS4_EERKNS6_IiEEbRKT0_+0xa4)[0x7f97029236e4]
[ailab07:20475] [ 4] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase13ac cessAndFlipIiNS_6flipOpEEENS_4ListIT_EERKNS_5UList IS4_EERKNS6_IiEEbRKT0_+0xa4)[0x7fb5838856e4]
[ailab07:20474] [ 4] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase10di stributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesER KNS_4ListINS_4PairIiEEEEiRKNS5_INS5_IiEEEEbSE_bRNS 5_IT_EERKT0_ii+0x550)[0x7f948fef34e0]
[ailab07:20472] [ 5] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase10di stributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesER KNS_4ListINS_4PairIiEEEEiRKNS5_INS5_IiEEEEbSE_bRNS 5_IT_EERKT0_ii+0x550)[0x7f04581f74e0]
[ailab07:20473] [ 5] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so(_ZNK4Foam17mapDistributeBase10dist ributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesERNS _4ListIT_EERKT0_i+0x73)[0x7f948ef81823]
[ailab07:20472] [ 6] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so(_ZNK4Foam17mapDistributeBase10dist ributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesERNS _4ListIT_EERKT0_i+0x73)[0x7f0457285823]
[ailab07:20473] [ 6] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase10di stributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesER KNS_4ListINS_4PairIiEEEEiRKNS5_INS5_IiEEEEbSE_bRNS 5_IT_EERKT0_ii+0x6b2)[0x7f9702925642]
[ailab07:20475] [ 5] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver9ad dLayersERKNS_15layerParametersERKNS_10dictionaryER KNS_4ListIiEEiRNS_19decompositionMethodERNS_16fvMe shDistributeE+0x2a55)[0x7f948ddbef85]
[ailab07:20472] [ 7] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver9ad dLayersERKNS_15layerParametersERKNS_10dictionaryER KNS_4ListIiEEiRNS_19decompositionMethodERNS_16fvMe shDistributeE+0x2a55)[0x7f04560c2f85]
[ailab07:20473] [ 7] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver8do LayersERKNS_10dictionaryES3_RKNS_15layerParameters ENS_14meshRefinement13FaceMergeTypeEbRNS_19decompo sitionMethodERNS_16fvMeshDistributeE+0x560)[0x7f948ddc0210]
[ailab07:20472] [ 8] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver8do LayersERKNS_10dictionaryES3_RKNS_15layerParameters ENS_14meshRefinement13FaceMergeTypeEbRNS_19decompo sitionMethodERNS_16fvMeshDistributeE+0x560)[0x7f04560c4210]
[ailab07:20473] [ 8] snappyHexMesh(+0x1ed1b)[0x5593e8aabd1b]
[ailab07:20472] [ 9] snappyHexMesh(+0x1ed1b)[0x55aaa22f1d1b]
[ailab07:20473] [ 9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f948cbb4083]
[ailab07:20472] [10] snappyHexMesh(+0x2333e)[0x5593e8ab033e]
[ailab07:20472] *** End of error message ***
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f0454eb8083]
[ailab07:20473] [10] snappyHexMesh(+0x2333e)[0x55aaa22f633e]
[ailab07:20473] *** End of error message ***
/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam17mapDistributeBase10di stributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesER KNS_4ListINS_4PairIiEEEEiRKNS5_INS5_IiEEEEbSE_bRNS 5_IT_EERKT0_ii+0x550)[0x7fb5838874e0]
[ailab07:20474] [ 5] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so(_ZNK4Foam17mapDistributeBase10dist ributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesERNS _4ListIT_EERKT0_i+0x73)[0x7f97019b3823]
[ailab07:20475] [ 6] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver9ad dLayersERKNS_15layerParametersERKNS_10dictionaryER KNS_4ListIiEEiRNS_19decompositionMethodERNS_16fvMe shDistributeE+0x2a55)[0x7f97007f0f85]
[ailab07:20475] [ 7] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libmeshTools.so(_ZNK4Foam17mapDistributeBase10dist ributeIiNS_6flipOpEEEvNS_8UPstream10commsTypesERNS _4ListIT_EERKT0_i+0x73)[0x7fb582915823]
[ailab07:20474] [ 6] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver8do LayersERKNS_10dictionaryES3_RKNS_15layerParameters ENS_14meshRefinement13FaceMergeTypeEbRNS_19decompo sitionMethodERNS_16fvMeshDistributeE+0x560)[0x7f97007f2210]
[ailab07:20475] [ 8] snappyHexMesh(+0x1ed1b)[0x5629c7247d1b]
[ailab07:20475] [ 9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f96ff5e6083]
[ailab07:20475] [10] snappyHexMesh(+0x2333e)[0x5629c724c33e]
[ailab07:20475] *** End of error message ***
/usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver9ad dLayersERKNS_15layerParametersERKNS_10dictionaryER KNS_4ListIiEEiRNS_19decompositionMethodERNS_16fvMe shDistributeE+0x2a55)[0x7fb581752f85]
[ailab07:20474] [ 7] /usr/lib/openfoam/openfoam2306/platforms/linux64GccDPInt32Opt/lib/libsnappyHexMesh.so(_ZN4Foam17snappyLayerDriver8do LayersERKNS_10dictionaryES3_RKNS_15layerParameters ENS_14meshRefinement13FaceMergeTypeEbRNS_19decompo sitionMethodERNS_16fvMeshDistributeE+0x560)[0x7fb581754210]
[ailab07:20474] [ 8] snappyHexMesh(+0x1ed1b)[0x563b221c9d1b]
[ailab07:20474] [ 9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7fb580548083]
[ailab07:20474] [10] snappyHexMesh(+0x2333e)[0x563b221ce33e]
[ailab07:20474] *** End of error message ***
--------------------------------------------------------------------------
Primary job terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun noticed that process rank 3 with PID 0 on node ailab07 exited on signal 11 (Segmentation fault)

Than I run reconstructPar. the mesh look good.
But, when i change the parameter of addlayerscontrol to these:

addLayersControls
{

relativeSizes true;


layers
{
wing
{
nSurfaceLayers 6;
}
}


expansionRatio 1.2;

finalLayerThickness 3;


minThickness 1;


nGrow 0;


featureAngle 60;

nRelaxIter 5;


nSmoothSurfaceNormals 1;


nSmoothNormals 3;


nSmoothThickness 10;


maxFaceThicknessRatio 0.5;

maxThicknessToMedialRatio 0.3;

minMedialAxisAngle 90;


nBufferCellsNoExtrude 0;

nLayerIter 50;
}

there was no error