- Procedure GMP::Solution::SetMIPStartFlag(GMP, solution, flag, effortLevel)¶
GMP::Solution::SetMIPStartFlag can be used to mark a
solution in the solution repository of a generated mathematical program
such that it should be used as a MIP start during the a MIP solve (or a
MIQP or MIQCP solve).
GMP::Solution::SetMIPStartFlag( GMP, ! (input) a generated mathematical program solution, ! (input) a solution flag, ! (input) a scalar value [effortLevel] ! (optional, default 0) a scalar value )
An element in
An integer scalar reference to a solution.
A scalar binary value to indicate whether the solution should be marked (value 1) or unmarked (value 0) as MIP start.
A scalar value to specify the level of effort that the solver should apply to the solution when using it as MIP start solution. The default value of 0 indicates that the solver should decide; the other values are explained below.
The procedure returns 1 on success, or 0 otherwise.
This procedure is only supported by CPLEX, Gurobi and COPT.
The argument effortLevel is only used by CPLEX.
The levels of effort and their effect as specified by argument effortLevel are:
Level 0: The solver decides.
Level 1: The solver checks feasibility of the corresponding MIP start.
Level 2: The solver solves the fixed LP problem specified by the MIP start.
Level 3: The solver solves a subMIP.
Level 4: The solver attempts to repair the MIP start if it is infeasible.
Level 5: A complete solution is injected without the solver performing the usual checks. If the solution defined by the MIP start is infeasible, behavior is undefined.