v9.64.2

ModelingToolkit v9.64.2

Diff since v9.64.1

Merged pull requests:

• add utilities and tests for disturbance modeling (#3314) (@baggepinnen)
• BVProblem with constraints (#3323) (@vyudu)
• fix: validate u0map and pmap (#3350) (@vyudu)
• Renaming discrete variables during structural simplification (plus refactoring tearing_reassemble) (#3379) (@vyudu)
• fix: fix array varables split across SCCs in SCCNonlinearProblem (#3384) (@AayushSabharwal)
• refactor: rewrite HomotopyContinuationProblem to target NonlinearSolveHomotopyContinuation.jl (#3385) (@AayushSabharwal)
• refactor: format (#3413) (@AayushSabharwal)
• fix: make the diffvar type check less restrictive (#3415) (@vyudu)
• feat: mark getproperty(::AbstractSystem, ::Symbol) as non-differentiable (#3422) (@AayushSabharwal)
• Replace vcat(eqs...) with reduce(vcat, eqs) (#3423) (@devmotion)

Closed issues:

• Nonsensical stuff is allowed in input paraemter maps (#3325)
• Calling reinit! makes the solver unstable (#3375)
• Solution somehow corrupted with IfLifting (#3383)
• Diffvar type check introduced in v9.63 causes error with complex diffvars (#3406)
• Re-creating MTK problems causes side effects (#3407)
• Can no longer simulate coupled ReactionSystem ODESystem (#3409)
• equations not defined??? (#3414)