ILOG CPLEX 11.0 Getting Started > Tutorials > Concert Technology Tutorial for C++ Users > Modifying an Optimization Problem: Example ilolpex3.cpp > Starting from a Previous Basis

Before solving the modified problem, example ilolpex3.cpp sets the optimizer option to IloCplex::Dual, as this is the algorithm that can generally take best advantage of the optimal basis from the previous solve after the addition of constraints.