network solution algorithm is provided by this add-in. Network
algorithms are generally faster than linear programming algorithms
for solving problems that can be modeled entirely as networks.
The problem solves generalized networks and can handle models
with integer restrictions. The mp_models add-in must be installed
to use this add-in.
The Network Flow Solver was modified on 2/20/2011
to allow models to have more than 32,000 arcs.