BARONMP Changelog#

20251225#

  • Updated to Baron 25.12.10, which inlcludes bug fixes.

  • Fixed issue with numeric precision when writing bounds

20251210#

  • Option obj:multi:options: fix integer-valued objective-specific options.

20251123#

  • Updated to Baron 25.11.17, which inlcludes bug fixes and performance improvements.

20251121#

  • New option obj:multi:options to control whether multi-objective option suffixes are used.

20251021#

  • Changes in MP: option cvt:expr:nlassign.

20251015#

  • Changes in MP

20250814#

  • Changes in MP

    • Improved preprocessing of logical and combinatorial expressions (options cvt:pre:unnest, cvt:pre:sort).

20250811#

  • Fixed floating-point output precision for model submission to Baron.

  • Changes in MP

    • Option cvt:pre:boundlogarg (default 0) to bound arguments of logarithm nonnegative. Previously always done, sometimes deteriorating performance of nonlinear solvers.

20250806#

  • Updated Baron to version 2025.8.5, which includes bugfixes.

20250801#

  • Changes in MP

    • Tolerances set by options pre:feastol, pre:feastolrel both need to be violated to produce a warning on contradicting variable/constraint bounds. Previously the preprocessor failed on any violation, without letting the solver try.

    • Options cvt:compl, cvt:compl:eps control complementarity reformulations.

20250617#

  • Changes in MP

    • Multi-objective emulator: added support for objective-specific options via objective suffixes beginning with option_

    • Option cvt:unnest: bits 2 and 4 switch on inlining of linear and quadratic subexpressions produced during reformulations (by default on).

    • Options cvt:pre:ctx2ineq, cvt:pre:ctx2count to control context propagation into conditional comparisons #267.

unreleased#

  • Changes in MP

    • Option cvt:qp2pass (default even faster parsing of quadratics)

    • Fix a bug in parsing of quadratic expressions, which could wrongly parse products of unequal linear expressions, such as (x-3)*(x-z-5).

20250329#

  • Changes in MP:

    • Option cvt:multoutcard to limit the size of out-multiplied QP expressions. Can improve speed on large models.

    • Improved parsing of quadratic expressions.

20250308#

  • Changes in MP.

20241227#

  • Updated to baron 24.12.21. In addition to bug fixes, this version comes with improvements in memory management, convexity identification, branching, and new relaxation and reduction strategies for certain quadratic and concave programs.

20241209#

  • Removed spurious output from execution of local solves.

  • Fixed bug that made outlev ineffective.

20241206#

  • Fixed issue with variable and constraint names containing invalid characters

  • Added solve results information

20241119#

  • Beta release of MP driver for Baron, use with option option solver baronmp;, to use the original ASL driver use option solver baron;

  • Breaking changes with ASL driver:

    • version keyword removed

    • Changed behaviour of the iisfind option to be consistent with MP features; see alg:iisfind, alg:iismethod, alg:iisint

    • Absolute values are reformulated as MIP instead of abs(x)=(x^2)^0.5

    • Added option value local to scratch that automatically places the scratch files in a directory with the name derived from the model file (e.g. for /test/model.nl the directory will be /test/model.nl_baron/)