Issues

• Enable partial MIP warm starts in the APPSI HiGHS interface (one-line change)

  enhancementpyomo.solvers
  Pyomo/pyomo#4044 · Filter by author adbuerger opened on Sep 30, 2026
  2

• GDPopt GLOA misclassifies affine expressions with mutable-parameter coefficients

  Pyomo/pyomo#4036 · Filter by author bernalde opened on Sep 6, 2026

• GAMS writer: warmstart does not initialize the GAMS_OBJECTIVE level

  Pyomo/pyomo#4024 · Filter by author bernalde opened on Aug 18, 2026

• GDPopt LBB treats solver RuntimeError as node infeasibility

  Pyomo/pyomo#4023 · Filter by author bernalde opened on Aug 18, 2026
  1

• Support solver-native indicator constraints as a GDP transformation target

  Pyomo/pyomo#4019 · Filter by author bernalde opened on Aug 16, 2026

• MindtPy: support single-tree LP/NLP B&B with APPSI / contrib.solver persistent interfaces

  Pyomo/pyomo#4020 · Filter by author bernalde opened on Aug 16, 2026

• gdpopt.enumerate raises bare TypeError for unbounded or float-bounded integer variables

  Pyomo/pyomo#4018 · Filter by author bernalde opened on Aug 16, 2026

• GDPopt docstring advertises unimplemented algorithms and omits implemented ones

  Pyomo/pyomo#4017 · Filter by author bernalde opened on Aug 16, 2026

• GDPopt relative_gap() raises ZeroDivisionError near zero primal bounds (misplaced epsilon guard)

  Pyomo/pyomo#4016 · Filter by author bernalde opened on Aug 16, 2026

• GDPopt meta-solver cannot dispatch to LDSDA (missing from _supported_algorithms)

  Pyomo/pyomo#4015 · Filter by author bernalde opened on Aug 16, 2026

• GDPopt: calc_disjunctive_bounds and obbt_disjunctive_bounds are accepted but silently ignored

  Pyomo/pyomo#4014 · Filter by author bernalde opened on Aug 16, 2026

• Params indexed by ContinuousSets are not initialized when the set is discretized.

  bug
  Pyomo/pyomo#4009 · Filter by author dallan-keylogic opened on Aug 14, 2026

• Find new cuopt testing environment or consider deprecation?

  bug
  Pyomo/pyomo#4005 · Filter by author jsiirola opened on Aug 11, 2026
  1

• [dae] Simulator treats indexed Expression as algebraic variable, causing CasADi "Dimension mismatch for alg"

  bug
  Pyomo/pyomo#4003 · Filter by author lxhowl opened on Aug 4, 2026
  1

• 94 tests fail

  bug
  Pyomo/pyomo#3999 · Filter by author yurivict opened on Jul 23, 2026
  2

• HiGHS not working with pyomo kernel models

  bug
  Pyomo/pyomo#3998 · Filter by author NathanDavisBarrett opened on Jul 22, 2026
  4

• Persistent interface to PETSc TS

  enhancement
  Pyomo/pyomo#3997 · Filter by author dallan-keylogic opened on Jul 22, 2026

• How should calculate_variable_from_constraint handle bounds?

  enhancement
  Pyomo/pyomo#3985 · Filter by author dallan-keylogic opened on Jun 25, 2026
  1

• Pyomo 6.10.1: fails with "Permission denied" on AWS lambda due to multiprocessing.Lock()

  bug
  Pyomo/pyomo#3977 · Filter by author bram-tv opened on Jun 17, 2026

• Create tests to ensure all solvers raise exceptions when the model contains unrecognized active components

  pyomo.solvers
  Task

  Pyomo/pyomo#3958 · Filter by author michaelbynum opened on May 19, 2026
  

• GDPopt enumerate materializes all discrete solutions before checking time_limit

  Pyomo/pyomo#3953 · Filter by author bernalde opened on May 14, 2026

• GDPopt LBB sends linear MIP relaxed-node subproblem to minlp_solver

  Pyomo/pyomo#3952 · Filter by author bernalde opened on May 14, 2026

• GDPopt LOA reports non-rigorous nonconvex bounds as optimal LB=UB

  Pyomo/pyomo#3947 · Filter by author bernalde opened on May 11, 2026
  1

• GDPopt LBB routes continuous node subproblems through minlp_solver

  Pyomo/pyomo#3945 · Filter by author bernalde opened on May 11, 2026

• FBBT emits RuntimeWarning for NumPy scalar bounds

  Pyomo/pyomo#3944 · Filter by author bernalde opened on May 11, 2026