Initializing help system before first use

# MIPFRACREDUCE

Description | Branch and Bound: Specifies how often the optimizer should run a heuristic to reduce the number of fractional integer variables in the node LP solutions.
Type | Integer
Topic areas | Branch and Bound Search, Root
Values |
-1 | Automatic.
0 | Disabled.
1 | Run before and after cutting on the root node.
2 | Run also during root cutting.
3 | Run also during the tree search.
Default value | -1
Note | This heuristic is only applicable to problems that are dual degenerate. These are problems that contain multiple solutions with identical objective function value. The more dual degenerate a problem is, the more likely it will be for this heuristic to have an improving effect.
Affects routines | XPRSmipoptimize ( MIPOPTIMIZE).
Category | Control

Parent Topic Control Parameters

© 2001-2026 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.