6 Releases published by 1 person

• v9.64.2

  published Feb 26, 2025

• v9.64.3

  published Feb 27, 2025

• v9.65.0

  published Mar 5, 2025

• v9.66.0

  published Mar 17, 2025

• v9.67.0

  published Mar 20, 2025

• v9.68.1

  published Mar 23, 2025

43 Pull requests merged by 12 people

• fix: fix jump system hack

  #3486 merged Mar 23, 2025

• CompatHelper: bump compat for DataInterpolations to 8 for package docs, (keep existing compat)

  #3488 merged Mar 23, 2025

• Format tutorial

  #3479 merged Mar 21, 2025

• test: make model parsing tests more generic

  #3478 merged Mar 20, 2025

• Remove undefined exports

  #3476 merged Mar 20, 2025

• feat: handle Initial(x) initialization_eqs in time-independent systems

  #3466 merged Mar 20, 2025

• fix: fix analysis point transform ignoring too many connections

  #3469 merged Mar 20, 2025

• Fix docstring for InitializationProblem

  #3474 merged Mar 20, 2025

• Reduce TTF@mtkmodel

  #3471 merged Mar 20, 2025

• fix: propagate tofloat, use_union to better_varmap_to_vars

  #3448 merged Mar 19, 2025

• Change independent variable of ODE systems

  #3437 merged Mar 19, 2025

• add toplevel arguments to various getters

  #3462 merged Mar 18, 2025

• fix: Throw better warning when a guess is missing

  #3456 merged Mar 18, 2025

• error message threw error message

  #3457 merged Mar 17, 2025

• build: bump minor version

  #3465 merged Mar 17, 2025

• fix: fix DEF parameters for split = true, flatten = false systems

  #3403 merged Mar 17, 2025

• feat: implement SciMLBase.detect_cycles

  #3427 merged Mar 17, 2025

• fix: fix symbolic maps given to linearize, warn in linearization_function

  #3432 merged Mar 17, 2025

• fix: don't use === for comparison in variable metadata tests

  #3463 merged Mar 17, 2025

• Fix: Make build explicit observed function return Expr when expression=true

  #3454 merged Mar 17, 2025

• feat: ImplicitDiscreteSystem

  #3386 merged Mar 13, 2025

• test: relax initializationsystem test

  #3455 merged Mar 12, 2025

• feat: support analysis points duplicating existing connections

  #3453 merged Mar 12, 2025

• feat: allow NonlinearSystem(::ODESystem) and NonlinearProblem(::ODESystem)

  #3440 merged Mar 5, 2025

• fix: separate Initial parameters into initials portion

  #3439 merged Mar 5, 2025

• feat: add isInitial

  #3433 merged Mar 3, 2025

• fix(nonlinearsystem): Fix codegen issue for vector parameters

  #3382 merged Mar 3, 2025

• CompatHelper: add new compat entry for FMIZoo at version 1 for package docs, (keep existing compat)

  #3435 merged Mar 1, 2025

• CompatHelper: add new compat entry for FMI at version 0.14 for package docs, (keep existing compat)

  #3434 merged Mar 1, 2025

• docs: add doc page for FMU import capability

  #3405 merged Feb 28, 2025

• Replace Expronicon with Moshi

  #3354 merged Feb 28, 2025

• feat: add map_variables_to_equations

  #3417 merged Feb 27, 2025

• fix: allow passing guesses to linearize, improve linearization docs

  #3412 merged Feb 27, 2025

• feat: run trivial initialization in problem constructor

  #3404 merged Feb 27, 2025

• build: bump patch version

  #3426 merged Feb 27, 2025

• fix: fix SCCNonlinearProblem reordering parameters

  #3425 merged Feb 27, 2025

• feat: mark getproperty(::AbstractSystem, ::Symbol) as non-differentiable

  #3422 merged Feb 26, 2025

• Replace vcat(eqs...) with reduce(vcat, eqs)

  #3423 merged Feb 26, 2025

• fix: make the diffvar type check less restrictive

  #3415 merged Feb 26, 2025

• Renaming discrete variables during structural simplification (plus refactoring tearing_reassemble)

  #3379 merged Feb 26, 2025

• refactor: rewrite HomotopyContinuationProblem to target NonlinearSolveHomotopyContinuation.jl

  #3385 merged Feb 25, 2025

• fix: fix array varables split across SCCs in SCCNonlinearProblem

  #3384 merged Feb 25, 2025

• refactor: format

  #3413 merged Feb 24, 2025

8 Pull requests opened by 6 people

• feat: throw error when differentiating registered function with no derivative in `structural_simplify`

  #3419 opened Feb 25, 2025

• output extra information from linearization

  #3429 opened Feb 27, 2025

• Buckingham PI implementation with DynamicQuantities

  #3443 opened Mar 5, 2025

• WIP: refactor: use `ImplicitDiscreteSystem` to implement affects in callback systems

  #3452 opened Mar 12, 2025

• fix: fix incorrect folding in `substitute` in `OptimizationSystem`

  #3475 opened Mar 20, 2025

• feat: support alternative AD backends in linearization

  #3477 opened Mar 20, 2025

• Change allow_symbolic to default to true

  #3481 opened Mar 21, 2025

• pass `ODESystem` kwargs via `@mtkmodel` constructor

  #3484 opened Mar 21, 2025

33 Issues closed by 7 people

• Wrong value for problems when guesses are provided for default values

  #3303 closed Mar 23, 2025

• Regression: Can no longer solve `SteadyStateProblem`s after `remake`

  #3483 closed Mar 23, 2025

• Improve printing/display of `XSystem` parameters

  #2651 closed Mar 22, 2025

• Clarify Comparison Against Modelica section of the documentation with regard to nonlinear systems

  #3472 closed Mar 21, 2025

• `OptimizationFunction` with `AutoForwardDiff` doesn't work with sparse `ODEProblem`

  #3376 closed Mar 20, 2025

• Unexpected results when using parameters in initial conditions

  #3356 closed Mar 20, 2025

• Errors and wrong solutions when solving `NonlinearSystem` with `initialization_eqs`

  #3458 closed Mar 20, 2025

• Jump simulations are `Float64` valued

  #3446 closed Mar 19, 2025

• Type promotion error when differentiating SteadyStateProblem

  #3430 closed Mar 19, 2025

• Better error message for missing guesses

  #3449 closed Mar 18, 2025

• Cannot simulate a certain ODESystem (probably one where everything gets simplified away)

  #3467 closed Mar 17, 2025

• `DEF` in parameters

  #3401 closed Mar 17, 2025

• `complete(sys; flatten=false)` creates unexpected DEF parameters

  #3322 closed Mar 17, 2025

• Strange `DEF` parameter appears in `parameter(sys)` for certain systems

  #3464 closed Mar 16, 2025

• Can create `NonlinearProblem` with missing variables

  #3461 closed Mar 15, 2025

• ODEFunction from the same ODESystem gives inconsistent ODE solve result

  #3450 closed Mar 13, 2025

• ImplicitDiscreteSystem

  #2077 closed Mar 13, 2025

• Strange error when evaluating the Jacobian for certain systems

  #3447 closed Mar 10, 2025

• Broken amount of parameters: much more parameters in resulting ODEProblem than symbolic parameters in MTK system

  #3444 closed Mar 5, 2025

• Cases of creation of `NonlinearSystem`s have been broken

  #3411 closed Mar 5, 2025

• Faulty non-boolean error in ifelse()

  #3441 closed Mar 4, 2025

• isInitial function

  #3431 closed Mar 3, 2025

• `remake` failures

  #3396 closed Mar 2, 2025

• `remake` issues

  #3410 closed Mar 2, 2025

• Obtain equation associated with a given variable?

  #3374 closed Feb 27, 2025

• Add ability to provide additional guesses to `linearize` and family

  #3400 closed Feb 27, 2025

• Trivial initialization problem isn't solved when creating `ODEProblem`

  #3290 closed Feb 27, 2025

• SciMLBase - equations bug fixed, but introduces new problems

  #3421 closed Feb 27, 2025

• Conditional branches inside `@component` statements do not support multiple components

  #3424 closed Feb 27, 2025

• Can no longer simulate coupled `ReactionSystem` `ODESystem`

  #3409 closed Feb 26, 2025

• Diffvar type check introduced in v9.63 causes error with complex diffvars

  #3406 closed Feb 26, 2025

• `equations` not defined???

  #3414 closed Feb 25, 2025

• Re-creating MTK problems causes side effects

  #3407 closed Feb 24, 2025

18 Issues opened by 14 people

• Symbolic indexing doesn't work when plotting ensemble summary

  #3491 opened Mar 23, 2025

• Cannot use `remake` with callable parameters

  #3490 opened Mar 23, 2025

• Stochastic term dropped from SDAE by structural_simplify

  #3489 opened Mar 23, 2025

• Substituting a constant = 1 seems to mutate variable type of certain types of parameters

  #3487 opened Mar 22, 2025

• Document DAEProblem constructor and give a warning about performance implications

  #3485 opened Mar 21, 2025

• Code generation contains `Differential` when equations contain variable time parameter

  #3480 opened Mar 20, 2025

• Creating of `OptimizationSystem` with registered function traces

  #3473 opened Mar 19, 2025

• BifurcationKit: Bad performance relative to user supplied vector field in a function

  #3468 opened Mar 18, 2025

• Add metadata for internal parameters

  #3460 opened Mar 15, 2025

• Add argument to accessor functions to ignore subsystems

  #3459 opened Mar 14, 2025

• `reinit!` now ignores given state (2nd argument) for an MTK-derived ODEIntegrator.

  #3451 opened Mar 10, 2025

• Derivatives in initialization equations

  #3445 opened Mar 7, 2025

• Less strict dataflow connection semantics

  #3442 opened Mar 4, 2025

• Variable bounds defined via @variables are not enforced during nonlinear equation solving

  #3438 opened Mar 4, 2025

• MTK & `@mtkbuild` -- structure of result?

  #3428 opened Feb 27, 2025

• `get_unit` not supported for callable parameter

  #3420 opened Feb 25, 2025

• RFC: Debugging utilities for initialization

  #3418 opened Feb 25, 2025

• sol[inlet.conc] does not work in flow connector

  #3416 opened Feb 25, 2025

9 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• `defaults` returns internal stuff

  #3408 commented on Mar 1, 2025 • 0 new comments

• method to simply plug a cosimulation function into ModelingToolkit.jl ?

  #3310 commented on Mar 1, 2025 • 0 new comments

• PDESystem Internal System Compatibility

  #2299 commented on Mar 1, 2025 • 0 new comments

• MTKv10 discussion

  #3204 commented on Mar 17, 2025 • 0 new comments

• Control over autodiff in linearization

  #3351 commented on Mar 20, 2025 • 0 new comments

• Internal Error: Variables Incorrectly Marked as Zero During Structural Simplification in ODE System

  #3003 commented on Mar 21, 2025 • 0 new comments

• add RealtimeClock

  #2414 commented on Feb 24, 2025 • 0 new comments

• Draft PR: Will be working on differential equations function transformations.

  #3391 commented on Mar 1, 2025 • 0 new comments

• Add support for an external synchronous compiler to discrete and hybrid systems

  #3399 commented on Mar 15, 2025 • 0 new comments