[stamufa]

I"m trying to mesh a simple case in parallel with snappyHex on 16 cores. This is how my decomposeParDict looks like

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  5                                     |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      decomposeParDict;
}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

numberOfSubdomains 16;

method          scotch;



// ************************************************************************* //

Warning no 'numberOfSubdomains' in 'system/decomposeParDict'

This has happened with other cases too. Is this a problem with MPI?

[pconen]

Hey,

I could not see the problem. But you can try out copy my Dict. Maybe there is missing something.
[CODE]
/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 6
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object decomposeParDict;
}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

numberOfSubdomains 24;

method scotch;

// ************************************************** *********************** //
[CODE/]

If this also does not work try to use lower value of cores. Maybe 2.