Initializing help system before first use

# MIPSTOPSTAGE

Description | This control allows stopping a MIP solve in an early stage of the solution process. If the control is set to a stage that is already completed then the next optimization will stop immediately. If the solution process stops due to this control, the STOPSTATUS attribute is set to MIPSTAGE.
Type | Integer
Topic areas | Limits, Branch and Bound Search
Values |
0 | MIPSTOPSTAGE_NONE— Do not stop at an early stage of the solve.
1 | MIPSTOPSTAGE_PRESOLVE— Stop after presolve.
2 | MIPSTOPSTAGE_PREROOTHEURS— Stop after heuristics run before the initial relaxation.
3 | MIPSTOPSTAGE_INITIALRELAXATION— Stop after solving the initial relaxation.
4 | MIPSTOPSTAGE_ROOT— Stop at the end of the root node.
Default value | 0
Note | For a single objective MIP, a sequence like MIPSTOPSTAGE=PRESOLVE, optimize(), MIPSTOPSTAGE=PREROOTHEURS, optimize(), MIPSTOPSTAGE=INITIALRELAXATION, optimize(), MIPSTOPSTAGE=ROOT, optimize(), essentially steps through the early stages of a solve. This stepping will not work for multi-objective problems since a multi-objective solve always starts from the initial stage of the first objective.
Affects routines | XPRSoptimize ( OPTIMIZE).
Category | Control

Parent Topic Control Parameters

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