[Deagle]

Hello!

Currently I'm trying to run a simulation of simpleFoam in parallel, but I'm running into an error for which I haven't found a solution and it's been stalling my progress for some time now. It would be really great if you could indicate where the problem lies.

The relevant steps I have followed up to the error:
1. Transform .unv file to polymesh. The mesh checks out and looks good in paraView.
2. Decompose the solution setup into a number (I used 4 in this case) processors, which went without problems.
3. Run simpleFoam in parallel using "mpirun -np 4 simpleFoam -parallel"

After running the command in step 3 the error shows up 4 times:

--> FOAM FATAL ERROR:
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

    From function UPstream::init(int& argc, char**& argv)
    in file UPstream.C at line 79.

I also tried decomposing a cavity tutorial case, with the same error. SO my guess would be something goes wrong in either decomposing the case or with the mpirun command.

Does anybody have a clue where this could come from?

Thank you.

Dennis

[Deagle]

Probably useful:
-When running icoFoam or simpleFoam there doesn't seem to be a problem.
- I'm using the latest version of OpenFOAM on windows 7, downloaded from http://www.cfdsupport.com/openfoam-for-windows.htm

Also
When trying to run the same (both cavity decomposed and my case) on CAELinux, the cavity runs both with and without MPIRUN without error. Doing exactly the same with my smpleFoam case gives the following error:

--> FOAM FATAL IO ERROR: 
Attempt to return dictionary entry as a primitive

file: /opt/openfoam211/tutorials/DN25/system/fvSolution::relaxationFactors::equations from line 60 to line 61.

    From function ITstream& primitiveEntry::stream() const
    in file db/dictionary/dictionaryEntry/dictionaryEntry.C at line 82.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1  Foam::IOerror::abort() in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2  Foam::dictionaryEntry::stream() const in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#3  Foam::solution::read(Foam::dictionary const&) in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#4  Foam::solution::solution(Foam::objectRegistry const&, Foam::fileName const&) in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#5  Foam::fvMesh::fvMesh(Foam::IOobject const&) in "/opt/openfoam211/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
#6  
 in "/opt/openfoam211/platforms/linux64GccDPOpt/bin/simpleFoam"
#7  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#8

Any idea what the source of this problem could be? I haven't changed anything in the files, so my guess would be the versions might be incompatible.

[Deagle]

Found the answer: apparently the windows version from CFD support uses the mpiexec.exe package instead of mpirun.

http://www.cfd-online.com/Forums/ope...llel-case.html