[anubasu]

Hi all,

I am running a modified interFOam, angledDuct tut case with a pipe flow. When the mass flow rate at the inlet is sufficiently large, the case is running but when I reduce the inlet velocity or mass flow rate it is running for some time and killing itself and produced a error file called 'a call to fork system to create a child process'. I have pasted the entire error below. Any suggestions please on how to resolve this error. Thanks very much.
[6] #0 Foam::error:rintStack(Foam::Ostream&)--------------------------------------------------------------------------
A process has executed an operation involving a call to the
"fork()" system call to create a child process. Open MPI is currently
operating in a condition that could result in memory corruption or
other system errors; your job may hang, crash, or produce silent
data corruption. The use of fork() (or system() or other calls that
create child processes) is strongly discouraged.

The process that invoked fork was:

Local host: [[62800,1],6] (PID 228349)

If you are *absolutely sure* that your application will successfully
and correctly survive a call to fork(), you may disable this warning
by setting the mpi_warn_on_fork MCA parameter to 0.
--------------------------------------------------------------------------
at ??:?
[6] #1 Foam::sigFpe::sigHandler(int) at ??:?
[6] #2 ? in "/lib64/libc.so.6"
[6] #3 Foam::symGaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) at ??:?
[6] #4 Foam::symGaussSeidelSmoother::smooth(Foam::Field<d ouble>&, Foam::Field<double> const&, unsigned char, int) const at ??:?
[6] #5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
[6] #6 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:?
[6] #7 Foam::fvMatrix<double>::solve(Foam::dictionary const&) at ??:?
[6] #8 Foam::fvMatrix<double>::solve() at ??:?
[6] #9 Foam::SolverPerformance<double> Foam::solve<double>(Foam::tmp<Foam::fvMatrix<doubl e> > const&) at ??:?
[6] #10 Foam::RASModels::kEpsilon<Foam::IncompressibleTurb ulenceModel<Foam::transportModel> >::correct() at ??:?
[6] #11 ? at ??:?
[6] #12 __libc_start_main in "/lib64/libc.so.6"
[6] #13 ? at ??:?
[d8s4b1:228349] *** Process received signal ***
[d8s4b1:228349] Signal: Floating point exception (8)
[d8s4b1:228349] Signal code: (-6)
[d8s4b1:228349] Failing at address: 0x8a58400037bfd
[d8s4b1:228349] [ 0] /lib64/libc.so.6(+0x36400)[0x2b6b9def9400]
[d8s4b1:228349] [ 1] /lib64/libc.so.6(gsignal+0x37)[0x2b6b9def9387]
[d8s4b1:228349] [ 2] /lib64/libc.so.6(+0x36400)[0x2b6b9def9400]
[d8s4b1:228349] [ 3] /apps/applications/openfoam/7/1/intel-19.0.4/OpenFOAM-7/platforms/linux64IccDPInt32Opt/lib/libOpenFOAM.so(_ZN4Foam22symGaussSeidelSmoother6sm oothERKNS_4wordERNS_5FieldIdEERKNS_9lduMatrixERKS5 _RKNS_10FieldFieldIS4_dEERKNS_8UPtrListIKNS_17lduI nterfaceFieldEEEhi+0x56a)[0x2b6b9cadfb7a]
[d8s4b1:228349] [ 4] /apps/applications/openfoam/7/1/intel-19.0.4/OpenFOAM-7/platforms/linux64IccDPInt32Opt/lib/libOpenFOAM.so(_ZNK4Foam22symGaussSeidelSmoother6s moothERNS_5FieldIdEERKS2_hi+0x26)[0x2b6b9cadf606]
[d8s4b1:228349] [ 5] /apps/applications/openfoam/7/1/intel-19.0.4/OpenFOAM-7/platforms/linux64IccDPInt32Opt/lib/libOpenFOAM.so(_ZNK4Foam12smoothSolver5solveERNS_5 FieldIdEERKS2_h+0x615)[0x2b6b9cad1e35]
[d8s4b1:228349] [ 6] /apps/applications/openfoam/7/1/intel-19.0.4/OpenFOAM-7/platforms/linux64IccDPInt32Opt/lib/libfiniteVolume.so(_ZN4Foam8fvMatrixIdE15solveSegr egatedERKNS_10dictionaryE+0x4ec)[0x2b6b9979d97c]
[d8s4b1:228349] [ 7] interFoam(_ZN4Foam8fvMatrixIdE5solveERKNS_10dictio naryE+0x340)[0x512980]
[d8s4b1:228349] [ 8] interFoam(_ZN4Foam8fvMatrixIdE5solveEv+0x1a1)[0x512121]
[d8s4b1:228349] [ 9] /apps/applications/openfoam/7/1/intel-19.0.4/OpenFOAM-7/platforms/linux64IccDPInt32Opt/lib/libincompressibleTurbulenceModels.so(_ZN4Foam5solv eIdEENS_17SolverPerformanceIT_EERKNS_3tmpINS_8fvMa trixIS2_EEEE+0x2b)[0x2b6b982963eb]
[d8s4b1:228349] [10] /apps/applications/openfoam/7/1/intel-19.0.4/OpenFOAM-7/platforms/linux64IccDPInt32Opt/lib/libincompressibleTurbulenceModels.so(_ZN4Foam9RASM odels8kEpsilonINS_29IncompressibleTurbulenceModelI NS_14transportModelEEEE7correctEv+0x825)[0x2b6b98217cb5]
[d8s4b1:228349] [11] interFoam[0x43ce5b]
[d8s4b1:228349] [12] /lib64/libc.so.6(__libc_start_main+0xf5)[0x2b6b9dee5555]
[d8s4b1:228349] [13] interFoam[0x42f669]
[d8s4b1:228349] *** 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 6 with PID 0 on node d8s4b1 exited on signal 8 (Floating point exception).