Plot the residuals over all the domain
 

Hello.
Is it possible with OpenFOAM 4.0 plot the residual field?
I want to plot the residual field to see where in the domain my simulation does not show good convergence.

I tried this in controlDict:

functions
{

residuals
{

type residuals;
libs ( "libutilityFunctionObjects.so" );
executeControl writeTime;
writeControl timeStep;
fields ( p_rgh h );
writeInterval 1;

}

}

This function plot only the largest value of the residual for the p_rgh and h fields but not the residuals fields over the domain.
I'm using the solver buoyantSimpleFoam.

Thanks