MOSEK Changelog#

20240901#

  • Option tech:logfile to write Mosek’s output to a log file

20240724#

  • Option acc:_all

    • Useful to disable all reformulations (acc:_all=2), or force linearization (acc:_all=0).

  • Option cvt:prod

    • Controls reformulation of binary products into logical constraints.

  • Faster input of quadratic expressions.

20240617#

  • Multi-objective emulator

    • obj:multi=2 forces emulation, even if MO natively supported.

    • Fixed a bug in the objective degradation suffixes .objasbtol, .objreltol.

20240604#

  • Presolve division by constant, resulting in fewer constraints

  • Fix no-solution case in multi-objective emulator

20240531#

  • Updated to MOSEK 10.2, which provides many bugfixes.

  • Added options mip:varselection, pre:dualray_analysis and lim:sol.

20240529#

  • Multi-objective emulator

    • All flat MP solvers support multi-objective mode (obj:multi=1), either natively, or via emulation.

    • Suffixes .objpriority, .objweight, .objabstol, .objreltol.

    • [BREAKING] Default intuitive handling of .objweight, see option obj:multi:weight, even when natively supported.

20240429#

  • [BREAKING] Merged report_times and timing; they are now aliases, set the value to 1 to have basic info, to 2 to have more detailed info.

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 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.)

20240118#

  • Native Mosek options

    • Use tech:optionnative, tech:optionnative(read/write) to read/write native options inline or to/from files. See mp.ampl.com/features-guide.html#solver-options.

20240115#

  • 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 vs QCP constraints.

    • For convex QCP problems, don’t attempt SOCP form. Previously some QCP problems required cvt:socp=0.

    • For conic problems, substitute QP terms from the objective as an auxiliary SOCP constraint (only for simple QP terms, otherwise should be done manually.)

    • Options cvt:socp, cvt:socp2qc.

  • Compact solution check warnings

  • Fixed presolve of the power function #226.

20231117#

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

20231103#

  • Improved translation of logical constraints: inlining of nested disjunctions and conjunctions; fewer auxiliary binary variables.

20231017#

  • Fixed a bug in NL reader on Windows.

  • Print a warning when not all quadratic constraints have been converted to cones.

20230919#

  • mp_options. Receive mp_options from AMPL (for all MP solvers). They are parsed before (solvername)_options.

  • Solution checking: relative tolerance sol:chk:feastolrel; options sol:chk:round, sol:chk:prec.

20230831#

  • Solution checking, options sol:chk:* (experimental).

  • Preprocess And/Or constraints.

20230817#

  • Fixed a bug causing repeated names for auxiliary variables and constraints.

  • Option values can be assigned without ‘=’.

  • Fixed a bug where equivalent conditional comparisons were not unified.

20230726#

  • Fixed inequalities of integer expressions with non-integer constants, see test_int_non_int.mod.

20230724#

  • option [solver_]auxfiles rc; transfers names of variables and linear constraints into the model; (solver)_options ‘cvt:names=0-3’ controls names.

20230621#

  • Fix quadratic objective with repeated subexpressions.

20230616#

  • Changes in MP.

20230531#

  • Cones: recognize (affine_expr) >= y * exp(z/y) as exponential cone.

  • Cones: recognize xy >= 1 as rotated SOC.

  • Wrong solver options are gracefully reported via solve_message.

20230515#

  • Exponential cones. MP driver recognizes exponential cones from their algebraic representation and passes them to Mosek.

20230505#

  • Updated Mosek library to version 10.0.43. It includes a number of bug fixes, including a numerical problem that could occur with disjunctive constraints

20230424#

  • Changes in the MP library: added variable names support and removed spurious starting solution

20230330#

  • Removed the message on missing dual solution for MIP.

20230321#

  • Recognition of second-order conic constraints from algebraic representations.

  • First release in the AMPL bundle.

20220420#

  • First release of mock driver.