CPLEXMP Changelog¶

20240320¶

SOS constraints.
- Fixed handling of SOS2 constraints created by AMPL as reformulations of PL expressions (option pl_linearize 1, default; set to 0 to use the solver’s native PL functions or MP linearization.)
- Disallow repeated weights for SOS constraints (suffixes .sosno/.ref.)
Option report_times
Unused acc: options.
- The constraint acceptance options acc:... for non-handled constraints are ignored (previously triggered error.)

Solve result codes.
- List codes by running (solver) -!
- [BREAKING] Standardized codes. Major changes:
  - 100-199 (solved?) means solution candidate provided, but can be suboptimal/infeasible
  - 300-349 means unbounded problem but feasible solution returned
  - 400-449 means limit/interrupt but feasible
- [BREAKING] sol:chk:fail returns code 150 (solved?)
Improved translation of SOCP constraints.
- Options cvt:socp, cvt:socp2qc.
Compact solution check warnings
Fixed presolve of the power function #226.
Added fixed model for mip:basis
Added options:
- alg:method and flags to choose the solution algorithm
- mip:nodemethod to choose the algorithm used for MIP node problems
- lp:solutiontype to choose if to use crossover to get a basis basis solution after barrier

Public beta; implemented most features in MP: model export, warm start, input and output basis, feasibility relaxation, multiple solutions, kappa, unbounded rays, IIS, return MIP gap, return dual bound
Native Model support:
- continuous and integer variables
- multiple objectives, quadratic objectives
- linear and quadratic constraints, indicator constraints and PL functions
- special ordered sets (type 1 and 2)

MP update: fixed graceful exit on Ctrl-C from AMPL in Linux and fixed issue with reading text-format NL files

CPLEX Changelog

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