CFD Online Discussion Forums - Adding non-static function to Foam::myPCG::solve?

Hello,

I get the following compile error:

myPCG.C: In member function ‘virtual Foam::solverPerformance Foam::myPCG::solve(Foam::scalarField&, const scalarField&, Foam::direction) const’:myPCG.C:171:33: error: invalid use of non-static member function ldu2ublas(matrix, ublas_matrix);

Code:

Foam::solverPerformance Foam::myPCG::solve

(

    scalarField& psi,

    const scalarField& source,

    const direction cmpt

) const

{



    // --- Setup class containing solver performance data

    solverPerformance solverPerf

    (

        lduMatrix::preconditioner::getName(controlDict_) + typeName,

        fieldName_

    );



    uint n = psi.size();



    boost::numeric::ublas::compressed_matrix<scalar> ublas_matrix(n,n);



    ldu2ublas(matrix, ublas_matrix);  // error: invalid use of non-static member function 



...

ldu2ublas() is used to store the OpenFoam matrix which has LDU format in CSR format in a boost ublas compressed_matrix.

Where/How must I introduce the function so it can be used in the solve section in PCG.C?

Klaus