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Allow bindings on indexed array parameter keys

Status: Open.

#5210 In SciML/ModelingToolkit.jl;

· Fololo opened on Sep 25, 2026

Clocked discrete events: no reaction at tspan[2] when it falls on a tick — intended contract? Please document (or expose final_affect)

Status: Open.

#5207 In SciML/ModelingToolkit.jl;

· pankgeorg opened on Sep 24, 2026

QA red on master: unapproved public reexports ap_var, canonical_constraints, constraint_residual

Status: Open.

#5201 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 23, 2026

Discrete event on a system with algebraic equations changes a differential state instead of the algebraic variable

Status: Open.

#5200 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 23, 2026

Cost gradient fails with 'Differentiation of x[1] inside lazy array expressions' when sum(A*x) is nested in the cost (hash-order dependent)

Status: Open.

#5199 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 23, 2026

Fails to solve SteadyStateProblem

bugSomething isn't workingSomething isn't working

Status: Open.

#5194 In SciML/ModelingToolkit.jl;

· wenflo opened on Sep 23, 2026

DAEProblem: accept derivative guesses instead of requiring every du0 in op, so MTK initialization can find consistent du0

Status: Open.

#5193 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 23, 2026

No derivative rule for instream_rt: jac = true fails with Float64(::Num) on multi-source stream connections

Status: Open.

#5192 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 23, 2026

Initialization fails for residual-form equations over array slices (Differential(t) with independent variable nothing)

Status: Open.

#5188 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 23, 2026

varmap_to_vars is quadratic in the element count of array unknowns (DAEProblem construction)

Status: Open.

#5187 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 23, 2026

SCC CacheWriter leaves whole arrays unbound when prior state symbols are views

Status: Open.

#5180 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 22, 2026

SCCNonlinearProblem with no remaining unknowns fails in ForwardDiff (chunk size 1 > structural length 0)

Status: Open.

#5179 In SciML/ModelingToolkit.jl;

· ChrisRackauckas-Claude opened on Sep 22, 2026