  We present a new improved version of our force-free electrodynamics (FFE)
numerical code in spherical coordinates that extrapolates the magnetic field in
the inner solar corona from a photospheric vector magnetogram. The code
satisfies the photospheric boundary condition and the condition divB=0 to
machine accuracy. The performance of our method is evaluated with standard
convergence parameters, and is found to be comparable to that of other
nonlinear force-free extrapolations.
