Initialize MIP Solution¶

You can initialize the solution of a MIP when solving it with CPLEX, GUROBI or CBC.

In some cases, you have an initial solution, but the solver does not seem to use it.

There are a few things you can check when this happens.

Check solver support¶

Make sure that you use a solver that supports the use of initial solutions (CPLEX, GUROBI or CBC).

Go to Settings > Project Options and set the following option:

CPLEX X.X: Specific solvers – CPLEX X.X - General - Advanced start -> Use advanced basis
GUROBI X.X: Specific solvers – GUROBI X.X - MIP - MIP Start -> Yes
CBC X.X: Specific solvers – CBC X.X - MIP - MIP Start -> On

Assign the values of your solution to the decision variables in your project and solve the model.

Last Updated: February, 2020