After optimization has completed, you can retrieve solutions from the solution pool using a few parameters and attributes. The SolCount attribute indicates how many solutions were retained by the MIP solver. The best solution can always be obtained through the X attribute. Sub-optimal solutions can be obtained by first setting the SolutionNumber parameter and then querying the Xn attribute to obtain the solution or the PoolObjVal attribute to obtain the objective value for the corresponding solution.
For example, to retrieve the worst solution kept by the MIP solver,
you'd first query
SolCount to determine how many solutions are
available, then set the
SolutionNumber parameter to
SolCount-1, then query the
The PoolObjBound attribute gives a
bound on the objective of undiscovered solutions. Further tree
exploration won't find better solutions. You can use this parameter
to get a count of how many of the best solutions you found: any
solutions whose objective values are at least as good as
PoolObjBound are among the best.