Getting pressure in Aneurysm case in each step of calculation

Lattice Boltzmann Method LBM: Algorithms
#1

I am trying to calculate pressure in each step in aneurysm case. after trying a lot and figuring out to do this :

[code=“cpp”]
while(!velocityTracer.hasConverged() && currentTime<simTime)
{
if (i%200==0 && performOutput) {
pcout << "T= " << currentTime << "; "
<< “Average energy: "
<< boundaryCondition.computeAverageEnergy()*util::sqr(dx/dt)
<<”; Pressure: "
<< OffLatticeBoundaryCondition3D<T,DESCRIPTOR,Velocity>::computePressure() <<std::endl;

    }
    if (i%convergenceIter==0) {
        velocityTracer.takeValue(computeAverageEnergy(*lattice));
    }

    lattice->collideAndStream();

    ++i;
    currentTime = i*dt;

}



I am getting this error :
[code="cpp"]
-I/home/at8i/workspace/palabos/src -I/home/at8i/workspace/palabos/externalLibraries pipeflow3d.cpp
pipeflow3d.cpp: In function ‘std::auto_ptr<plb::MultiBlockLattice3D<double, plb::descriptors::D3Q19Descriptor> > run(plb::plint, plb::MultiBlockLattice3D<double, plb::descriptors::D3Q19Descriptor>*)’:
pipeflow3d.cpp:396:92: error: cannot call member function ‘std::auto_ptr<plb::MultiScalarField3D<T> > plb::OffLatticeBoundaryCondition3D<T, Descriptor, BoundaryType>::computePressure() [with T = double; Descriptor = plb::descriptors::D3Q19Descriptor; BoundaryType = plb::Array<double, 3ul>]’ without object
                   << OffLatticeBoundaryCondition3D<T,DESCRIPTOR,Velocity>::computePressure() <<std::endl;
                                                                                            ^
scons: *** [pipeflow3d.o] Error 1
scons: building terminated because of errors.
make: *** [compile] Error 2

and while we are on aneurysm case , in Param file of aneurysm case there is a place where volume is set. Is that the volume of fluid injected into the aneurysm?