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Old   March 5, 2012, 07:12
Default crash:parallel run and writetime?
  #1
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mauricio
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Hello every1!

i'm trying to run a case here in parallel. I have AMI cyclic patches. I say this cuz with non cyclic patchs there's no crash!

when i run the case in 1 core no crashes occur, but when i run it in parallel, as amazing as it seems, the code crashes exactly at the time when the code is supposed to run data.

crash
Code:
Time = 100

DILUPBiCG:  Solving for Ux, Initial residual = 0.0088670851, Final residual = 8.2588747e-06, No Iterations 2
DILUPBiCG:  Solving for Uy, Initial residual = 0.006774242, Final residual = 4.4254254e-06, No Iterations 2
DILUPBiCG:  Solving for Uz, Initial residual = 0.0065591327, Final residual = 3.0181564e-06, No Iterations 2
DILUPBiCG:  Solving for h, Initial residual = 0.017110962, Final residual = 1.5308887e-05, No Iterations 2
DICPCG:  Solving for p_rgh, Initial residual = 0.029165174, Final residual = 2.8152129e-05, No Iterations 77
time step continuity errors : sum local = 0.00040282475, global = -3.6998014e-05, cumulative = 0.016089871
rho max/min : 0.99440505 0.99214534
DILUPBiCG:  Solving for epsilon, Initial residual = 0.00090743349, Final residual = 9.3285783e-06, No Iterations 2
bounding epsilon, min: 1.015437e-16 max: 22767.272 average: 594.21879
DILUPBiCG:  Solving for k, Initial residual = 0.0047676626, Final residual = 2.1129995e-06, No Iterations 4
[3] #0  Foam::error::printStack(Foam::Ostream&)[1] #0  Foam::error::printStack(Foam::Ostream&)[0] #0  Foam::error::printStack(Foam::Ostream&)[2] #0  Foam::error::printStack(Foam::Ostream&) in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #1  Foam::sigSegv::sigHandler(int) in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/li in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so in "/"
opt/OpenFOAM-2.1.0[3] #1  /platforms/linuxGFoam::sigSegv::sigHandler(int)ccDPOpt/lib/libOpenFOAM.so"
[2] #1  Foam::sigSegv::sigHandler(int)bOpenFOAM.so"
[0] #1  Foam::sigSegv::sigHandler(int) in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #2  Uninterpreted: 
[1] #3  Foam::externalWallHeatFluxTemperatureFvPatchScalarField::write(Foam::Ostream&) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #2  Uninterpreted: 
[3] #3   in Foam::externalWallHeatFluxTemperatureFvPatchScalarField::write(Foam::Ostream&) const"/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #2  Uninterpreted: 
[2] #3  Foam::externalWallHeatFluxTemperatureFvPatchScalarField::write(Foam::Ostream&) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #2  Uninterpreted: 
[0] #3  Foam::externalWallHeatFluxTemperatureFvPatchScalarField::write(Foam::Ostream&) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libcompressibleTurbulenceModel.so"
[1] #4   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libcompressibleTurbulenceModel.so"
[3] #4   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libcompressibleTurbulenceModel.so"
[2] #4   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libcompressibleTurbulenceModel.so"
[0] #4  Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::GeometricBoundaryField::writeEntry(Foam::word const&, Foam::Ostream&) constFoam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::GeometricBoundaryField::writeEntry(Foam::word const&, Foam::Ostream&) constFoam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::GeometricBoundaryField::writeEntry(Foam::word const&, Foam::Ostream&) constFoam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::GeometricBoundaryField::writeEntry(Foam::word const&, Foam::Ostream&) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[3] #5   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[1] #5   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[0] #5   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[2] #5  Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::writeData(Foam::Ostream&) constFoam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::writeData(Foam::Ostream&) constFoam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::writeData(Foam::Ostream&) constFoam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::writeData(Foam::Ostream&) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[3] #6  Foam::regIOobject::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[2] #6  Foam::regIOobject::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[1] #6  Foam::regIOobject::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[0] #6  Foam::regIOobject::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #7  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #7  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #7  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #7  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #8  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #8  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #8  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #8  Foam::objectRegistry::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #9  Foam::Time::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #9  Foam::Time::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #9  Foam::Time::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #10  Foam::regIOobject::write() const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #10  Foam::regIOobject::write() const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #9  Foam::Time::writeObject(Foam::IOstream::streamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #10  Foam::regIOobject::write() const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[2] #11   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[0] #11   in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #10  Foam::regIOobject::write() const in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[3] #11  


 in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so"
[1] #11  [2]  in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[2] #12  __libc_start_main[0]  in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[0] #12  __libc_start_main[3]  in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[3] #12  __libc_start_main
 in "/lib/libc.so.6"
[2] #13   in "/lib/libc.so.6"
[0] #13  [1]  in "/opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/bin/buoyantSimpleFoam"
[1] #12  __libc_start_main in "/lib/libc.so.6"
[3] #13  

 in "/lib/libc.so.6"
[1] #13  
[2]  at /usr/src/packages/BUILD/glibc-2.11.3/csu/../sysdeps/i386/elf/start.S:122
[BR-SBC-WS-296L:29767] *** Process received signal ***
[BR-SBC-WS-296L:29767] Signal: Segmentation fault (11)
[BR-SBC-WS-296L:29767] Signal code:  (-6)
[BR-SBC-WS-296L:29767] Failing at address: 0x7447

[0]  at /usr/src/packages/BUILD/glibc-2.11.3/csu/../sysdeps/i386/elf/start.S:122
[BR-SBC-WS-296L:29767] [ 0] [0xffffe40c]
[BR-SBC-WS-296L:29767] [ 1] [0xffffe424]
[BR-SBC-WS-296L:29767] [ 2] /lib/libc.so.6(gsignal+0x4f) [0xb59df8df]
[BR-SBC-WS-296L:29767] [ 3] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZN4Foam7sigSegv10sigHandlerEi+0x61) [0xb60c0d61]
[BR-SBC-WS-296L:29767] [ 4] [0xffffe400]
[BR-SBC-WS-296L:29767] [ 5] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libcompressibleTurbulenceModel.so(_ZNK4Foam49externalWallHeatFluxTemperatureFvPatchScalarField5writeERNS_7OstreamE+0x38) [0xb735c908]
[BR-SBC-WS-296L:29767] [ 6] buoyantSimpleFoam(_ZNK4Foam14GeometricFieldIdNS_12fvPatchFieldENS_7volMeshEE22GeometricBoundaryField10writeEntryERKNS_4wordERNS_7OstreamE+0x133) [0x80b0bd3]
[BR-SBC-WS-296L:29767] [ 7] buoyantSimpleFoam(_ZNK4Foam14GeometricFieldIdNS_12fvPatchFieldENS_7volMeshEE9writeDataERNS_7OstreamE+0x12f) [0x80b448f]
[BR-SBC-WS-296L:29767] [ 8] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam11regIOobject11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x3ff) [0xb5e5e86f]
[BR-SBC-WS-296L:29767] [ 9] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam14objectRegistry11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x94) [0xb5e61e34]
[BR-SBC-WS-296L:29767] [10] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam14objectRegistry11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x94) [0xb5e61e34]
[BR-SBC-WS-296L:29767] [11] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam4Time11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x391) [0xb5e85ea1]
[BR-SBC-WS-296L:29767] [12] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam11regIOobject5writeEv+0x6b) [0xb5e5eccb]
[BR-SBC-WS-296L:29767] [13] buoyantSimpleFoam() [0x806bb93]
[BR-SBC-WS-296L:29767] [14] /lib/libc.so.6(__libc_start_main+0xfe) [0xb59cac2e]
[BR-SBC-WS-296L:29767] [15] buoyantSimpleFoam() [0x8065291]
[BR-SBC-WS-296L:29767] *** End of error message ***
[BR-SBC-WS-296L:29765] *** Process received signal ***
[BR-SBC-WS-296L:29765] Signal: Segmentation fault (11)
[BR-SBC-WS-296L:29765] Signal code:  (-6)
[BR-SBC-WS-296L:29765] Failing at address: 0x7445
[BR-SBC-WS-296L:29765] [ 0] [0xffffe40c]
[BR-SBC-WS-296L:29765] [ 1] [0xffffe424]
[BR-SBC-WS-296L:29765] [ 2] /lib/libc.so.6(gsignal+0x4f) [0xb5a9f8df]
[BR-SBC-WS-296L:29765] [ 3] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZN4Foam7sigSegv10sigHandlerEi+0x61) [0xb6180d61]
[BR-SBC-WS-296L:29765] [ 4] [0xffffe400]
[BR-SBC-WS-296L:29765] [ 5] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libcompressibleTurbulenceModel.so(_ZNK4Foam49externalWallHeatFluxTemperatureFvPatchScalarField5writeERNS_7OstreamE+0x38) [0xb741c908]
[BR-SBC-WS-296L:29765] [ 6] buoyantSimpleFoam(_ZNK4Foam14GeometricFieldIdNS_12fvPatchFieldENS_7volMeshEE22GeometricBoundaryField10writeEntryERKNS_4wordERNS_7OstreamE+0x133) [0x80b0bd3]
[BR-SBC-WS-296L:29765] [ 7] buoyantSimpleFoam(_ZNK4Foam14GeometricFieldIdNS_12fvPatchFieldENS_7volMeshEE9writeDataERNS_7OstreamE+0x12f) [0x80b448f]
[BR-SBC-WS-296L:29765] [ 8] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam11regIOobject11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x3ff) [0xb5f1e86f]
[BR-SBC-WS-296L:29765] [ 9] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam14objectRegistry11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x94) [0xb5f21e34]
[BR-SBC-WS-296L:29765] [10] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam14objectRegistry11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x94) [0xb5f21e34]
[BR-SBC-WS-296L:29765] [11] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam4Time11writeObjectENS_8IOstream12streamFormatENS1_13versionNumberENS1_15compressionTypeE+0x391) [0xb5f45ea1]
[BR-SBC-WS-296L:29765] [12] /opt/OpenFOAM-2.1.0/platforms/linuxGccDPOpt/lib/libOpenFOAM.so(_ZNK4Foam11regIOobject5writeEv+0x6b) [0xb5f1eccb]
[BR-SBC-WS-296L:29765] [13] buoyantSimpleFoam() [0x806bb93]
[BR-SBC-WS-296L:29765] [14] /lib/libc.so.6(__libc_start_main+0xfe) [0xb5a8ac2e]
[BR-SBC-WS-296L:29765] [15] buoyantSimpleFoam() [0x8065291]
[BR-SBC-WS-296L:29765] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 2 with PID 29767 on node BR-SBC-WS-296L exited on signal 11 (Segmentation fault).
--------------------------------------------------------------------------
controldict
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.0.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "system";
    object      controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

application     buoyantSimpleFoam;

startFrom       latestTime;

startTime       0;

stopAt          endTime;

endTime         2000;

deltaT          1;

writeControl    adjustableRunTime;

writeInterval   100;

purgeWrite      0;

writeFormat     binary;

writePrecision  8;

writeCompression off;

timeFormat      general;

timePrecision   6;

runTimeModifiable yes;

//maxCo           0.3;

// Maximum diffusion number
//maxDi           10.0;


// ************************************************************************* //
i've tried scotch and hierarchical decompostion methods, different write times and yet i get crash... coincidence?? precedences? has any1 seen this b4?

any inputs are welcome!!

edit:

it turns out the problem was with the boundary condition externalWallHeatFluxTemperature. I had changed this BC cuz it was printing out all 3 parameters h, Ta and q, regardless of its input. I had to change it cuz another application, wallHeatFlux wouldn't run if i had all 3 parameters so i change the code from this
Code:
{
    mixedFvPatchScalarField::write(os);
    temperatureCoupledBase::write(os);

    //if (q_ != 0)
    //{
     q_.writeEntry("q", os);     
    // this->writeEntry("value", os);
    //}

    //else 
    //{       
     h_.writeEntry("h", os);
     Ta_.writeEntry("Ta", os);
     this->writeEntry("value", os);
    //}
}
to this

Code:
{
    mixedFvPatchScalarField::write(os);
    temperatureCoupledBase::write(os);

    if (q_ != 0)
    {
     q_.writeEntry("q", os);     
     this->writeEntry("value", os);
    }

    else 
    {       
     h_.writeEntry("h", os);
     Ta_.writeEntry("Ta", os);
     this->writeEntry("value", os);
    }
}
but i guess my if statement isnt that great.. the code has this form:

Code:
 if (dict.found("q") && !dict.found("h") && !dict.found("Ta"))
    {
        oldMode_ = fixedHeatFlux;
        q_ = scalarField("q", dict, p.size());
    }
    else if (dict.found("h") && dict.found("Ta") && !dict.found("q"))
    {
        oldMode_ = fixedHeatTransferCoeff;
        h_ = scalarField("h", dict, p.size());
        Ta_ = scalarField("Ta", dict, p.size());
    }
but this if statement wont let the lib to be compiled!

any hints??

thank you so much
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/calim

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Last edited by calim_cfd; March 5, 2012 at 07:38. Reason: new info-solution
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Old   March 5, 2012, 18:13
Default
  #2
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Bruno Santos
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wyldckat is just really nicewyldckat is just really nicewyldckat is just really nicewyldckat is just really nice
Hi Calim,

First of all, I suggest that you update your OpenFOAM 2.1.0 to 2.1.x. AMI is a new feature as of 2.1.0 and a few bugs have already been found and fixed on 2.1.x.

As for the other error with "dict"... I don't know which "dict" you're referring to. And without an error message, it's even more difficult to figure out what's wrong.

Best regards,
Bruno
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Old   March 5, 2012, 20:13
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  #3
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mauricio
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Quote:
Originally Posted by wyldckat View Post
Hi Calim,

First of all, I suggest that you update your OpenFOAM 2.1.0 to 2.1.x. AMI is a new feature as of 2.1.0 and a few bugs have already been found and fixed on 2.1.x.

As for the other error with "dict"... I don't know which "dict" you're referring to. And without an error message, it's even more difficult to figure out what's wrong.

Best regards,
Bruno
the last error isnt much of an error, ti's just a non compatibility with the BC (externalwallheatfluxtemperature) im using and the application wallHeatFlux. For the latter to work i must only have the pair h and ta or q in my T dictionary. But the BC writes all 3 so i can never get it to work. So i thought of putting an IF statement at the of the BC to ensure it would only write the outputs related to the setting at time 0/ .

But anyway i'll have to make other modifications and create a different bc lib from this one, so i'll leave it for the moment. Plus i should have modified the application instead of the BC

thanks for the feedback! and i'll definitely update OF.
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