[ashkan]

Hi All,

I am trying to modify the force functionObject (force.C). There I need to calculate an integral of scalar field over a surface. In force.H I defined the following line:

List<Field<vector> > force_;
List<Field<vector> > moment_;
List<Field<scalar> > SubSurface_;

Then in the force.C (calcForcesMoment) I added

    
force_[0] = vector::zero;
force_[1] = vector::zero;
force_[2] = vector::zero;

moment_[0] = vector::zero;
moment_[1] = vector::zero;
moment_[2] = vector::zero;
    
SubSurface_ = 0.0;

However when I compile I get the following error

subforces/subforces.C:757:19: error: no match for ‘operator=’ in ‘((Foam::subforces*)this)->Foam::subforces::SubSurface_ = 0.0’
subforces/subforces.C:757:19: note: candidates are:
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:429:6: note: void Foam::List<T>::operator=(const Foam::UList<T>&) [with T = Foam::Field<double>]
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:429:6: note:   no known conversion for argument 1 from ‘double’ to ‘const Foam::UList<Foam::Field<double> >&’
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:461:6: note: void Foam::List<T>::operator=(const Foam::List<T>&) [with T = Foam::Field<double>]
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:461:6: note:   no known conversion for argument 1 from ‘double’ to ‘const Foam::List<Foam::Field<double> >&’
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:476:6: note: void Foam::List<T>::operator=(const Foam::SLList<T>&) [with T = Foam::Field<double>]
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:476:6: note:   no known conversion for argument 1 from ‘double’ to ‘const Foam::SLList<Foam::Field<double> >&’
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:504:6: note: void Foam::List<T>::operator=(const Foam::UIndirectList<T>&) [with T = Foam::Field<double>]
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:504:6: note:   no known conversion for argument 1 from ‘double’ to ‘const Foam::UIndirectList<Foam::Field<double> >&’
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:523:6: note: void Foam::List<T>::operator=(const Foam::BiIndirectList<T>&) [with T = Foam::Field<double>]
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/List.C:523:6: note:   no known conversion for argument 1 from ‘double’ to ‘const Foam::BiIndirectList<Foam::Field<double> >&’
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/ListI.H:140:13: note: void Foam::List<T>::operator=(const T&) [with T = Foam::Field<double>]
/media/Data/OpenFOAM/OpenFOAM-3.0.x/src/OpenFOAM/lnInclude/ListI.H:140:13: note:   no known conversion for argument 1 from ‘double’ to ‘const Foam::Field<double>&’

Line 757 that it refers to is

    
SubSurface_ = 0.0;

I believe it means I cannot assign 0 to my List. How can I resolve this issue?

Many thank in advance
Ashkan