implementation of mapFields into parallel transient case

simpomann · May 30, 2012, 09:16

Hey,

I calculate a flow around an object, based on the motorBike tutorial.
A steady-state case is set up, that creates a directory at timestep 50 that i want to implement into my transient case. The snappyHexMesh options are the same for both.

Unluckily i am not sure how i can implement the mapFields function into my transient-Allrun.

My steady-state Allrun (solver is SIMPLE, results look allright)

Code:

#!/bin/sh
# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions

cp system/fvSolution.OF2.1.0 system/fvSolution
cp system/fvSchemes.OF2.1.0 system/fvSchemes
cp 0.org/nut.OF2.1.0 0.org/nut
cp constant/polyMesh/blockMeshDict.OF2.1.0 constant/polyMesh/blockMeshDict
cp -r 0.org 0 > /dev/null 2>&1

runApplication blockMesh

runApplication snappyHexMesh -overwrite

runApplication decomposePar

runParallel renumberMesh 6 -overwrite

runParallel potentialFoam 6 -initialiseUBCs -noFunctionObjects

runParallel `getApplication` 6

runApplication reconstructPar -time 50

My transient-case Allrun: (solver is PIMPLE)

Code:

#!/bin/sh
# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions

cp system/fvSolution.OF2.1.0 system/fvSolution
cp system/fvSchemes.OF2.1.0 system/fvSchemes
cp 0.org/nut.OF2.1.0 0.org/nut
cp constant/polyMesh/blockMeshDict.OF2.1.0 constant/polyMesh/blockMeshDict
cp -r 0.org 0 > /dev/null 2>&1

runApplication blockMesh

runApplication snappyHexMesh -overwrite

mapFields /home/simon/openFoam/nachstellen/startwerte/ -sourceTime 50 -consistent 

runApplication decomposePar

runParallel renumberMesh 6 -overwrite

runParallel `getApplication` 6

runApplication reconstructParMesh -constant -mergeTol 1e-6

runApplication reconstructPar

During the mapping process no error appears in the terminal window. All log files seem okay except for the pimple log!

And this is my PIMPLE log:

Code:

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.1.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.1.0-0bc225064152
Exec   : pimpleFoam -parallel
Date   : May 30 2012
Time   : 13:57:50
Host   : "simon-desktop"
PID    : 5693
Case   : /home/simon/openFoam/nachstellen/parallel
nProcs : 6
Slaves : 
5
(
"simon-desktop.5694"
"simon-desktop.5695"
"simon-desktop.5696"
"simon-desktop.5697"
"simon-desktop.5698"
)

Pstream initialized with:
    floatTransfer     : 0
    nProcsSimpleSum   : 0
    commsType         : nonBlocking
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Disallowing user-supplied system call operations

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

Create mesh for time = 0

Reading field p

Reading field U

Reading/calculating face flux field phi

Selecting incompressible transport model Newtonian
Selecting turbulence model type LESModel
Selecting LES turbulence model SpalartAllmarasDDES
No field sources present


PIMPLE: Operating solver in PISO mode


Starting time loop

Courant Number mean: 0.135977 max: 5.28681
Time = 0.001

DILUPBiCG:  Solving for Ux, Initial residual = 0.00271502, Final residual = 2.0949e-06, No Iterations 5
DILUPBiCG:  Solving for Uy, Initial residual = 0.00274523, Final residual = 4.48912e-06, No Iterations 4
DILUPBiCG:  Solving for Uz, Initial residual = 0.00143448, Final residual = 5.34199e-06, No Iterations 4
GAMG:  Solving for p, Initial residual = 0.294934, Final residual = 0.00136378, No Iterations 4
time step continuity errors : sum local = 6.86498e-08, global = -3.4579e-09, cumulative = -3.4579e-09
GAMG:  Solving for p, Initial residual = 0.0391325, Final residual = 8.14741e-07, No Iterations 16
time step continuity errors : sum local = 4.55977e-11, global = -2.81814e-12, cumulative = -3.46072e-09
[1] [5] #0  Foam::error::printStack(Foam::Ostream&)[3] [4] #0[0]   Foam::error::printStack(Foam::Ostream&)[2] #0  Foam::error::printStack(Foam::Ostream&)#0  Foam::error::printStack(Foam::Ostream&)##0  Foam::error::printStack(Foam::Ostream&)0  Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[5] #1  Foam::sigFpe::sigHandler(int) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[4] #1  Foam::sigFpe::sigHandler(int) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #1  Foam::sigFpe::sigHandler(int) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #1  Foam::sigFpe::sigHandler(int) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #1  Foam::sigFpe::sigHandler(int) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #1  Foam::sigFpe::sigHandler(int) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #2  Uninterpreted: 
[1] #3  Foam::PBiCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[4] #2  Uninterpreted: 
[4] #3  Foam::PBiCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #2  Uninterpreted: 
[2] #3  Foam::PBiCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[5] #2  Uninterpreted: 
[5] #3  Foam::PBiCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #4  Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #2  Uninterpreted: 
[3] #3  Foam::PBiCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[4] #4  Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #4  Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #2  Uninterpreted: 
[0] #3  Foam::PBiCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #4  Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #4  Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so"
[1] #5  Foam::fvMatrix<double>::solve() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so"
[4] #5  Foam::fvMatrix<double>::solve() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so"
[2] #5  Foam::fvMatrix<double>::solve() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[5] #4  Foam::fvMatrix<double>::solve(Foam::dictionary const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so"
[4] #6  Foam::incompressible::LESModels::SpalartAllmaras::correct(Foam::tmp<Foam::GeometricField<Foam::Tensor<double>, Foam::fvPatchField, Foam::volMesh> > const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so"
[3] #5  Foam::fvMatrix<double>::solve() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so"
[2] #6  Foam::incompressible::LESModels::SpalartAllmaras::correct(Foam::tmp<Foam::GeometricField<Foam::Tensor<double>, Foam::fvPatchField, Foam::volMesh> > const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so"
[0] #5  Foam::fvMatrix<double>::solve() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so"
[5] #5  Foam::fvMatrix<double>::solve() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so"
[3] #6  Foam::incompressible::LESModels::SpalartAllmaras::correct(Foam::tmp<Foam::GeometricField<Foam::Tensor<double>, Foam::fvPatchField, Foam::volMesh> > const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[4] #7  Foam::incompressible::LESModel::correct() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so"
[5] #6  Foam::incompressible::LESModels::SpalartAllmaras::correct(Foam::tmp<Foam::GeometricField<Foam::Tensor<double>, Foam::fvPatchField, Foam::volMesh> > const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so"
[1] #6  Foam::incompressible::LESModels::SpalartAllmaras::correct(Foam::tmp<Foam::GeometricField<Foam::Tensor<double>, Foam::fvPatchField, Foam::volMesh> > const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so"
[0] #6  Foam::incompressible::LESModels::SpalartAllmaras::correct(Foam::tmp<Foam::GeometricField<Foam::Tensor<double>, Foam::fvPatchField, Foam::volMesh> > const&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[3] #7  Foam::incompressible::LESModel::correct() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[2] #7  Foam::incompressible::LESModel::correct() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[1] #7  Foam::incompressible::LESModel::correct() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[5] #7  Foam::incompressible::LESModel::correct() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[0] #7  Foam::incompressible::LESModel::correct() in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[2] #8   in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[4] #8   in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[1] #8   in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[0] #8   in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[3] #8   in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so"
[5] #8  




[4]  in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/pimpleFoam"
[4] #9  __libc_start_main
[2]  in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/pimpleFoam"
[2] #9  __libc_start_main[0]  in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/pimpleFoam"
[0] #9  __libc_start_main in "/lib/tls/i686/cmov/libc.so.6"
[4] #10  [1]  in [3]  in "/opt/openf"/opt/openfoam210/platfooam210/platforms/linuxGccDPOpt/bin/pimpleFoam"
rms/linuxGccDPOpt/bin/pimpleFoam"
[1] #9  [3] #9  __libc_start_main__libc_start_main in "/lib/tls/i686/cmov/libc.so.6"
[0] #10  
[5]  in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/pimpleFoam"
[5] #9  __libc_start_main in "/lib/tls/i686/cmov/libc.so.6"
[2] #10   in "/lib/tls/i686/cmov/libc.so.6"
[1] #10   in "/lib/tls/i686/cmov/libc.so.6"
[5] #10  
[4]  in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/pimpleFoam"
[simon-desktop:05697] *** Process received signal ***
[simon-desktop:05697] Signal: Floating point exception (8)
[simon-desktop:05697] Signal code:  (-6)
[simon-desktop:05697] Failing at address: 0x1641
[simon-desktop:05697] [ 0] [0xb777e410]
[simon-desktop:05697] [ 1] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZN4Foam6sigFpe10sigHandlerEi+0x61) [0xb6055ea1]
[simon-desktop:05697] [ 2] [0xb777e400]
[simon-desktop:05697] [ 3] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so(_ZN4Foam8fvMatrixIdE5solveERKNS_10dictionaryE+0x165) [0xb69c3f45]
[simon-desktop:05697] [ 4] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so(_ZN4Foam8fvMatrixIdE5solveEv+0xe5) [0xb74a5e45]
[simon-desktop:05697] [ 5] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so(_ZN4Foam14incompressible9LESModels15SpalartAllmaras7correctERKNS_3tmpINS_14GeometricFieldINS_6TensorIdEENS_12fvPatchFieldENS_7volMeshEEEEE+0xa6b) [0xb73003eb]
[simon-desktop:05697] [ 6] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so(_ZN4Foam14incompressible8LESModel7correctEv+0x44) [0xb72ae724]
[simon-desktop:05697] [ 7] pimpleFoam() [0x805f34e]
[simon-desktop:05697] [ 8] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6) [0xb59a9bd6]
[simon-desktop:05697] [ 9] pimpleFoam() [0x805bee1]
[simon-desktop:05697] *** End of error message ***

 in "/lib/tls/i686/cmov/libc.so.6"
[3] #10  
[0]  in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/pimpleFoam"
[simon-desktop:05693] *** Process received signal ***
[simon-desktop:05693] Signal: Floating point exception (8)
[simon-desktop:05693] Signal code:  (-6)
[simon-desktop:05693] Failing at address: 0x163d
[simon-desktop:05693] [ 0] [0xb7737410]
[simon-desktop:05693] [ 1] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZN4Foam6sigFpe10sigHandlerEi+0x61) [0xb600eea1]
[simon-desktop:05693] [ 2] [0xb7737400]
[simon-desktop:05693] [ 3] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libfiniteVolume.so(_ZN4Foam8fvMatrixIdE5solveERKNS_10dictionaryE+0x165) [0xb697cf45]
[simon-desktop:05693] [ 4] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleRASModels.so(_ZN4Foam8fvMatrixIdE5solveEv+0xe5) [0xb745ee45]
[simon-desktop:05693] [ 5] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so(_ZN4Foam14incompressible9LESModels15SpalartAllmaras7correctERKNS_3tmpINS_14GeometricFieldINS_6TensorIdEENS_12fvPatchFieldENS_7volMeshEEEEE+0xa6b) [0xb72b93eb]
[simon-desktop:05693] [ 6] /opt/openfoam210/platforms/linuxGccDPOpt/lib/libincompressibleLESModels.so(_ZN4Foam14incompressible8LESModel7correctEv+0x44) [0xb7267724]
[simon-desktop:05693] [ 7] pimpleFoam() [0x805f34e]
[simon-desktop:05693] [ 8] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6) [0xb5962bd6]
[simon-desktop:05693] [ 9] pimpleFoam() [0x805bee1]
[simon-desktop:05693] *** End of error message ***

--------------------------------------------------------------------------
mpirun noticed that process rank 4 with PID 5697 on node simon-desktop exited on signal 8 (Floating point exception).
--------------------------------------------------------------------------

Without the mapFields, my case should work. For sure it does without parallel-settings and map-fields.

Big thanks in advance, i am new to this programme (got started 1 month ago) and completely lost. I will give all necessary information, please help me!

I am completely unsure about how to implement parallelization and mapping correctly. I reconstruct time 50 in my steady-state case because mapFields with -sourceParallel doesn't work at all.
I want the transient-case to take the fields from my steady-state case as initial conditions. Am I on the right track?

Best regards,

Simon

SirWombat · June 1, 2012, 03:47

Hi Simon,

there's this: "Courant Number mean: 0.135977 max: 5.28681"

It seems a little high. Try to start with a smaller initial timestep. I guess you started with DeltaT = 0.001 ... so try 0.0001 or even lower.

What about MeshQuality, have you checked?

Greets Jan

simpomann · June 1, 2012, 14:13

Hey,

Thanks for your advice! I added
"adjustTimeStep yes;
maxCo 1.0;

to my transient case Allrun and now the solver is working.
Good success.

Unluckily the mapping still doesn't work.
The message appearing within the terminal window:

Code:

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.1.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.1.0-0bc225064152
Exec   : mapFields /home/simon/openFoam/longterm/startwerte -consistent -parallelSource
Date   : Jun 01 2012
Time   : 19:04:02
Host   : "simon-desktop"
PID    : 2038
Case   : /home/simon/openFoam/longterm/parallel
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Disallowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Source: "/home/simon/openFoam/longterm" "startwerte"
Target: "/home/simon/openFoam/longterm" "parallel"

Create databases as time
Create target mesh

Target mesh size: 1253378

Source processor 0

Source time: 0
Target time: 0
mesh size: 417792
--> FOAM Warning : 
    From function meshToMesh::calcAddressing()
    in file meshToMeshInterpolation/meshToMesh/calculateMeshToMeshAddressing.C at line 156
    Source patch inlet has no faces. Not performing mapping for it.

Mapping fields for time 0

    interpolating ccz
#0  Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#1  Foam::sigSegv::sigHandler(int) in "/opt/openfoam210/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
#2  Uninterpreted: 
#3  
 in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/mapFields"
#4  
 in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/mapFields"
#5  
 in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/mapFields"
#6  
 in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/mapFields"
#7  
 in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/mapFields"
#8  __libc_start_main in "/lib/tls/i686/cmov/libc.so.6"
#9  
 in "/opt/openfoam210/platforms/linuxGccDPOpt/bin/mapFields"
Segmentation fault

How can I implement the mapping?

sebas · September 3, 2012, 12:33

Hey simon!

sorry for the lag but I'm quite new to the forum.

It looks like mapFields wants to map the stuff in the "0" time folder (which is not reconstructed). That's why it complains about the empty patch.

You should change your startTime in your target controlDict to 50 and/or maybe create a folder for time "50" as well.

Hope that helps.

B.T.W. it should work without reconstructing to if you give it the options -parallelSource (and -parallelTarget)

yb8119 · August 2, 2016, 05:41

Hi sebas!

I got the same problem as described in the post, and I tried your method which is to reconstruct the source case.

Then the warnings did disappeared, however, nothing was written into processor folders.

The command I used is

mapFields ../test_parallel -parallelTarget -consistent

the output in the terminal looked like:

Create databases as time
Create source mesh

Source time: 2.5
Target time: 2.5
Source mesh size: 1600

Target processor 0
mesh size: 1016

Mapping fields for time 2.5

Target processor 1
mesh size: 584

Mapping fields for time 2.5

Do you have any idea why this happens?
Thanks in advance!

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June 1, 2012, 03:47		#2
SirWombat Member Jan Join Date: Dec 2009 Location: Berlin Posts: 50 Rep Power: 19	Hi Simon, there's this: "Courant Number mean: 0.135977 max: 5.28681" It seems a little high. Try to start with a smaller initial timestep. I guess you started with DeltaT = 0.001 ... so try 0.0001 or even lower. What about MeshQuality, have you checked? Greets Jan __________________ ~~~_/)~~~

September 3, 2012, 12:33		#4
sebas New Member Sebastian Bomberg Join Date: Aug 2012 Location: Munich, Germany Posts: 12 Rep Power: 14	Hey simon! sorry for the lag but I'm quite new to the forum. It looks like mapFields wants to map the stuff in the "0" time folder (which is not reconstructed). That's why it complains about the empty patch. You should change your startTime in your target controlDict to 50 and/or maybe create a folder for time "50" as well. Hope that helps. B.T.W. it should work without reconstructing to if you give it the options -parallelSource (and -parallelTarget)

August 2, 2016, 05:41		#5
yb8119 New Member Join Date: Jul 2016 Posts: 4 Rep Power: 10	Hi sebas! I got the same problem as described in the post, and I tried your method which is to reconstruct the source case. Then the warnings did disappeared, however, nothing was written into processor folders. The command I used is mapFields ../test_parallel -parallelTarget -consistent the output in the terminal looked like: Create databases as time Create source mesh Source time: 2.5 Target time: 2.5 Source mesh size: 1600 Target processor 0 mesh size: 1016 Mapping fields for time 2.5 Target processor 1 mesh size: 584 Mapping fields for time 2.5 Do you have any idea why this happens? Thanks in advance! Last edited by yb8119; August 2, 2016 at 05:44. Reason: Wrong post