[fanta]

Hi,
i use a functionobject for my solver to calculate the residence Time.
So in my controlDict there is this Code:

functions
{
       residence_time
    {
        type    scalarTransport;
        functionObjectLibs ("libsolverFunctionObjects.so");
        writeControl outputTime;
    writeInterval 200;
        active          true;
        autoSchemes     true;
        nCorr           0;
        resetOnStartUp false;
        //DT              1e-5;

        fvOptions
        {
            IncrementTime
            {
            type            scalarSemiImplicitSource;
            active          true;
            cellZone        Layers;
                scalarSemiImplicitSourceCoeffs
                {
                    volumeMode specific;//absolute;
            selectionMode   all;//cellZone;
                    injectionRateSuSp
                    {
                        residence_time       (1 0);
                    }
                }
            }
        }
    }
}

But when i run the solver, it expects a file called s:

Starting time loop

Selecting finite volume options model type scalarSemiImplicitSource
    Source: IncrementTime
    - selecting all cells
    - selected 257742 cell(s) with volume 1.3825e-05

--> FOAM FATAL IO ERROR: 
cannot find file

file: 0/s at line 0.

    From function regIOobject::readStream()
    in file db/regIOobject/regIOobjectRead.C at line 237.

I don't think i need a file called s, it should be defined in my controlDict. I don't understand why i does not run. OpenFOAM is Version 1706 with Ubuntu 1604 TLS. Can anyone help me?

(My work is based on this thread: Mean Age of Air if that helps).