DAE mass-matrix form: how much of OrdinaryDiffEq do I need to depend on?

[Ickaser]

Describe the example

In the switch from OrdinaryDiffEqRosenbrock@1.1 to OrdinaryDiffEqRosenbrock@1.2, some tooling for solving DAEs in mass-matrix form is no longer exported.

I notice that on the upgrade from 1.1 to 1.2, OrdinaryDiffEqNonlinearSolve and some other related packages are removed as dependencies.

If I just need to depend on another subset of SciML, I don't mind, just need to know what to import (and maybe this should make it into the documentation at https://docs.sciml.ai/DiffEqDocs/stable/tutorials/dae_example/ ?)

Minimal Reproducible Example 👇

using OrdinaryDiffEqRosenbrock
function dae(u, p, t)
    return [-u[1], u[2]+u[1]]
end
massmat = [1 0; 0 0]
dae_f = ODEFunction(dae, mass_matrix = massmat)
pr = ODEProblem(dae_f, [1.0, -1.0], (0.0, 1.0))
solve(pr, Rosenbrock23())

Error & Stacktrace ⚠️

With OrdinaryDiffEqRosenbrock v1.2

ERROR: MethodError: no method matching _initialize_dae!(::OrdinaryDiffEqCore.ODEIntegrator{…}, ::ODEProblem{…}, ::OrdinaryDiffEqCore.BrownFullBasicInit{…}, ::Val{…})

Closest candidates are:
  _initialize_dae!(::Any, ::ODEProblem, ::SciMLBase.CheckInit, ::Val{false})
   @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\initialize_dae.jl:224
  _initialize_dae!(::Any, ::ODEProblem, ::OrdinaryDiffEqCore.DefaultInit, ::Val{false})
   @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\initialize_dae.jl:68
  _initialize_dae!(::Any, ::Union{DAEProblem, ODEProblem}, ::OrdinaryDiffEqCore.OverrideInit, ::Union{Val{true}, Val{false}})
   @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\initialize_dae.jl:152
  ...

Stacktrace:
  [1] _initialize_dae!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, prob::ODEProblem{…}, alg::OrdinaryDiffEqCore.DefaultInit, x::Val{…})
    @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\initialize_dae.jl:74
  [2] initialize_dae!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, initializealg::OrdinaryDiffEqCore.DefaultInit)
    @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\initialize_dae.jl:50
  [3] __init(prob::ODEProblem{…}, alg::Rosenbrock23{…}, timeseries_init::Tuple{}, ts_init::Tuple{}, ks_init::Tuple{}, recompile::Type{…}; saveat::Tuple{}, tstops::Tuple{}, d_discontinuities::Tuple{}, save_idxs::Nothing, save_everystep::Bool, save_on::Bool, save_start::Bool, save_end::Nothing, callback::Nothing, dense::Bool, calck::Bool, dt::Float64, dtmin::Float64, dtmax::Float64, force_dtmin::Bool, adaptive::Bool, gamma::Rational{…}, abstol::Nothing, reltol::Nothing, qmin::Rational{…}, qmax::Int64, qsteady_min::Int64, qsteady_max::Rational{…}, beta1::Nothing, beta2::Nothing, qoldinit::Rational{…}, controller::Nothing, fullnormalize::Bool, failfactor::Int64, maxiters::Int64, internalnorm::typeof(DiffEqBase.ODE_DEFAULT_NORM), internalopnorm::typeof(LinearAlgebra.opnorm), isoutofdomain::typeof(DiffEqBase.ODE_DEFAULT_ISOUTOFDOMAIN), unstable_check::typeof(DiffEqBase.ODE_DEFAULT_UNSTABLE_CHECK), verbose::Bool, timeseries_errors::Bool, dense_errors::Bool, advance_to_tstop::Bool, stop_at_next_tstop::Bool, initialize_save::Bool, progress::Bool, progress_steps::Int64, progress_name::String, progress_message::typeof(DiffEqBase.ODE_DEFAULT_PROG_MESSAGE), progress_id::Symbol, userdata::Nothing, allow_extrapolation::Bool, initialize_integrator::Bool, alias_u0::Bool, alias_du0::Bool, initializealg::OrdinaryDiffEqCore.DefaultInit, kwargs::@Kwargs{})
    @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\solve.jl:506
  [4] __init (repeats 5 times)
    @ C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\solve.jl:11 [inlined]
  [5] __solve(::ODEProblem{…}, ::Rosenbrock23{…}; kwargs::@Kwargs{})
    @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\solve.jl:6
  [6] __solve
    @ OrdinaryDiffEqCore C:\Users\iwheeler\.julia\packages\OrdinaryDiffEqCore\NnA60\src\solve.jl:1 [inlined]
  [7] #solve_call#44
    @ DiffEqBase C:\Users\iwheeler\.julia\packages\DiffEqBase\frOsk\src\solve.jl:612 [inlined]
  [8] solve_call(_prob::ODEProblem{…}, args::Rosenbrock23{…})
    @ DiffEqBase C:\Users\iwheeler\.julia\packages\DiffEqBase\frOsk\src\solve.jl:569
  [9] solve_up(prob::ODEProblem{…}, sensealg::Nothing, u0::Vector{…}, p::SciMLBase.NullParameters, args::Rosenbrock23{…}; kwargs::@Kwargs{})
    @ DiffEqBase C:\Users\iwheeler\.julia\packages\DiffEqBase\frOsk\src\solve.jl:1092
 [10] solve_up
    @ C:\Users\iwheeler\.julia\packages\DiffEqBase\frOsk\src\solve.jl:1078 [inlined]
 [11] solve(prob::ODEProblem{…}, args::Rosenbrock23{…}; sensealg::Nothing, u0::Nothing, p::Nothing, wrap::Val{…}, kwargs::@Kwargs{})
    @ DiffEqBase C:\Users\iwheeler\.julia\packages\DiffEqBase\frOsk\src\solve.jl:1015
 [12] solve(prob::ODEProblem{…}, args::Rosenbrock23{…})
    @ DiffEqBase C:\Users\iwheeler\.julia\packages\DiffEqBase\frOsk\src\solve.jl:1005
 [13] top-level scope
    @ REPL[8]:1
 [14] top-level scope
    @ none:1
Some type information was truncated. Use `show(err)` to see complete types.

Not Working Environment (please complete the following information):

• Output of using Pkg; Pkg.status()

Status `C:\Users\iwheeler\OneDrive - purdue.edu\Documents\OtherCode\example_repo\Project.toml`
  [43230ef6] OrdinaryDiffEqRosenbrock v1.2.0

• Output of using Pkg; Pkg.status(; mode = PKGMODE_MANIFEST)

Status `C:\Users\iwheeler\OneDrive - purdue.edu\Documents\OtherCode\example_repo\Manifest.toml`
  [47edcb42] ADTypes v1.9.0
  [7d9f7c33] Accessors v0.1.38
  [79e6a3ab] Adapt v4.1.1
  [ec485272] ArnoldiMethod v0.4.0
  [4fba245c] ArrayInterface v7.16.0
  [4c555306] ArrayLayouts v1.10.4
  [62783981] BitTwiddlingConvenienceFunctions v0.1.6
  [2a0fbf3d] CPUSummary v0.2.6
  [d360d2e6] ChainRulesCore v1.25.0
  [fb6a15b2] CloseOpenIntervals v0.1.13
  [38540f10] CommonSolve v0.2.4
  [bbf7d656] CommonSubexpressions v0.3.1
  [f70d9fcc] CommonWorldInvalidations v1.0.0
  [34da2185] Compat v4.16.0
  [a33af91c] CompositionsBase v0.1.2
  [2569d6c7] ConcreteStructs v0.2.3
  [187b0558] ConstructionBase v1.5.8
  [adafc99b] CpuId v0.3.1
  [9a962f9c] DataAPI v1.16.0
  [864edb3b] DataStructures v0.18.20
  [e2d170a0] DataValueInterfaces v1.0.0
  [2b5f629d] DiffEqBase v6.158.3
  [163ba53b] DiffResults v1.1.0
  [b552c78f] DiffRules v1.15.1
  [ffbed154] DocStringExtensions v0.9.3
  [4e289a0a] EnumX v1.0.4
  [f151be2c] EnzymeCore v0.8.5
  [e2ba6199] ExprTools v0.1.10
⌅ [6b7a57c9] Expronicon v0.8.5
  [7034ab61] FastBroadcast v0.3.5
  [9aa1b823] FastClosures v0.3.2
  [29a986be] FastLapackInterface v2.0.4
  [a4df4552] FastPower v1.1.1
  [1a297f60] FillArrays v1.13.0
  [6a86dc24] FiniteDiff v2.26.0
  [f6369f11] ForwardDiff v0.10.37
  [069b7b12] FunctionWrappers v1.1.3
  [77dc65aa] FunctionWrappersWrappers v0.1.3
⌃ [46192b85] GPUArraysCore v0.1.6
  [86223c79] Graphs v1.12.0
  [3e5b6fbb] HostCPUFeatures v0.1.17
  [615f187c] IfElse v0.1.1
  [d25df0c9] Inflate v0.1.5
  [3587e190] InverseFunctions v0.1.17
  [92d709cd] IrrationalConstants v0.2.2
  [82899510] IteratorInterfaceExtensions v1.0.0
  [692b3bcd] JLLWrappers v1.6.1
  [ef3ab10e] KLU v0.6.0
  [ba0b0d4f] Krylov v0.9.8
  [10f19ff3] LayoutPointers v0.1.17
  [5078a376] LazyArrays v2.2.1
  [7ed4a6bd] LinearSolve v2.36.2
  [2ab3a3ac] LogExpFunctions v0.3.28
  [bdcacae8] LoopVectorization v0.12.171
  [d8e11817] MLStyle v0.4.17
  [1914dd2f] MacroTools v0.5.13
  [d125e4d3] ManualMemory v0.1.8
  [46d2c3a1] MuladdMacro v0.2.4
  [77ba4419] NaNMath v1.0.2
  [6fe1bfb0] OffsetArrays v1.14.1
  [bac558e1] OrderedCollections v1.6.3
  [bbf590c4] OrdinaryDiffEqCore v1.9.0
  [4302a76b] OrdinaryDiffEqDifferentiation v1.1.0
  [43230ef6] OrdinaryDiffEqRosenbrock v1.2.0
  [65ce6f38] PackageExtensionCompat v1.0.2
  [d96e819e] Parameters v0.12.3
  [f517fe37] Polyester v0.7.16
  [1d0040c9] PolyesterWeave v0.2.2
  [d236fae5] PreallocationTools v0.4.24
  [aea7be01] PrecompileTools v1.2.1
  [21216c6a] Preferences v1.4.3
  [3cdcf5f2] RecipesBase v1.3.4
  [731186ca] RecursiveArrayTools v3.27.3
  [f2c3362d] RecursiveFactorization v0.2.23
  [189a3867] Reexport v1.2.2
  [ae029012] Requires v1.3.0
  [7e49a35a] RuntimeGeneratedFunctions v0.5.13
  [94e857df] SIMDTypes v0.1.0
  [476501e8] SLEEFPirates v0.6.43
  [0bca4576] SciMLBase v2.58.1
  [c0aeaf25] SciMLOperators v0.3.12
  [53ae85a6] SciMLStructures v1.5.0
  [efcf1570] Setfield v1.1.1
  [699a6c99] SimpleTraits v0.9.4
  [ce78b400] SimpleUnPack v1.1.0
  [47a9eef4] SparseDiffTools v2.23.0
  [e56a9233] Sparspak v0.3.9
  [276daf66] SpecialFunctions v2.4.0
  [aedffcd0] Static v1.1.1
  [0d7ed370] StaticArrayInterface v1.8.0
  [90137ffa] StaticArrays v1.9.8
  [1e83bf80] StaticArraysCore v1.4.3
  [7792a7ef] StrideArraysCore v0.5.7
  [2efcf032] SymbolicIndexingInterface v0.3.34
  [3783bdb8] TableTraits v1.0.1
  [bd369af6] Tables v1.12.0
  [8290d209] ThreadingUtilities v0.5.2
  [d5829a12] TriangularSolve v0.2.1
  [781d530d] TruncatedStacktraces v1.4.0
  [3a884ed6] UnPack v1.0.2
  [3d5dd08c] VectorizationBase v0.21.71
  [19fa3120] VertexSafeGraphs v0.2.0
  [1d5cc7b8] IntelOpenMP_jll v2024.2.1+0
  [856f044c] MKL_jll v2024.2.0+0
  [efe28fd5] OpenSpecFun_jll v0.5.5+0
  [1317d2d5] oneTBB_jll v2021.12.0+0
  [0dad84c5] ArgTools v1.1.1
  [56f22d72] Artifacts
  [2a0f44e3] Base64
  [ade2ca70] Dates
  [8ba89e20] Distributed
  [f43a241f] Downloads v1.6.0
  [7b1f6079] FileWatching
  [9fa8497b] Future
  [b77e0a4c] InteractiveUtils
  [4af54fe1] LazyArtifacts
  [b27032c2] LibCURL v0.6.4
  [76f85450] LibGit2
  [8f399da3] Libdl
  [37e2e46d] LinearAlgebra
  [56ddb016] Logging
  [d6f4376e] Markdown
  [a63ad114] Mmap
  [ca575930] NetworkOptions v1.2.0
  [44cfe95a] Pkg v1.10.0
  [de0858da] Printf
  [3fa0cd96] REPL
  [9a3f8284] Random
  [ea8e919c] SHA v0.7.0
  [9e88b42a] Serialization
  [1a1011a3] SharedArrays
  [6462fe0b] Sockets
  [2f01184e] SparseArrays v1.10.0
  [10745b16] Statistics v1.10.0
  [fa267f1f] TOML v1.0.3
  [a4e569a6] Tar v1.10.0
  [8dfed614] Test
  [cf7118a7] UUIDs
  [4ec0a83e] Unicode
  [e66e0078] CompilerSupportLibraries_jll v1.0.5+1
  [deac9b47] LibCURL_jll v8.4.0+0
  [e37daf67] LibGit2_jll v1.6.4+0
  [29816b5a] LibSSH2_jll v1.11.0+1
  [c8ffd9c3] MbedTLS_jll v2.28.2+1
  [14a3606d] MozillaCACerts_jll v2023.1.10
  [4536629a] OpenBLAS_jll v0.3.23+2
  [05823500] OpenLibm_jll v0.8.1+2
  [bea87d4a] SuiteSparse_jll v7.2.1+1
  [83775a58] Zlib_jll v1.2.13+1
  [8e850b90] libblastrampoline_jll v5.8.0+1
  [8e850ede] nghttp2_jll v1.52.0+1
  [3f19e933] p7zip_jll v17.4.0+2

• Output of versioninfo()

Julia Version 1.10.0
Commit 3120989f39 (2023-12-25 18:01 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 8 × 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, tigerlake)
  Threads: 1 on 8 virtual cores
Environment:
  JULIA_CONDAPKG_BACKEND = Null
  JULIA_PYTHONCALL_EXE = C:\Users\iwheeler\Miniconda3\python.exe

Working Environment (please complete the following information):

• Output of using Pkg; Pkg.status()

Status `C:\Users\iwheeler\OneDrive - purdue.edu\Documents\OtherCode\example_repo\Project.toml`
⌃ [43230ef6] OrdinaryDiffEqRosenbrock v1.1.1
Info Packages marked with ⌃ have new versions available and may be upgradable.

• Output of using Pkg; Pkg.status(; mode = PKGMODE_MANIFEST)

Status `C:\Users\iwheeler\OneDrive - purdue.edu\Documents\OtherCode\example_repo\Manifest.toml`
  [47edcb42] ADTypes v1.9.0
  [7d9f7c33] Accessors v0.1.38
  [79e6a3ab] Adapt v4.1.1
  [ec485272] ArnoldiMethod v0.4.0
  [4fba245c] ArrayInterface v7.16.0
  [4c555306] ArrayLayouts v1.10.4
  [62783981] BitTwiddlingConvenienceFunctions v0.1.6
  [2a0fbf3d] CPUSummary v0.2.6
  [d360d2e6] ChainRulesCore v1.25.0
  [fb6a15b2] CloseOpenIntervals v0.1.13
  [38540f10] CommonSolve v0.2.4
  [bbf7d656] CommonSubexpressions v0.3.1
  [f70d9fcc] CommonWorldInvalidations v1.0.0
  [34da2185] Compat v4.16.0
  [a33af91c] CompositionsBase v0.1.2
  [2569d6c7] ConcreteStructs v0.2.3
  [187b0558] ConstructionBase v1.5.8
  [adafc99b] CpuId v0.3.1
  [9a962f9c] DataAPI v1.16.0
  [864edb3b] DataStructures v0.18.20
  [e2d170a0] DataValueInterfaces v1.0.0
  [2b5f629d] DiffEqBase v6.158.3
  [163ba53b] DiffResults v1.1.0
  [b552c78f] DiffRules v1.15.1
  [a0c0ee7d] DifferentiationInterface v0.6.20
  [ffbed154] DocStringExtensions v0.9.3
  [4e289a0a] EnumX v1.0.4
  [f151be2c] EnzymeCore v0.8.5
  [e2ba6199] ExprTools v0.1.10
⌅ [6b7a57c9] Expronicon v0.8.5
  [7034ab61] FastBroadcast v0.3.5
  [9aa1b823] FastClosures v0.3.2
  [29a986be] FastLapackInterface v2.0.4
  [a4df4552] FastPower v1.1.1
  [1a297f60] FillArrays v1.13.0
  [6a86dc24] FiniteDiff v2.26.0
  [f6369f11] ForwardDiff v0.10.37
  [069b7b12] FunctionWrappers v1.1.3
  [77dc65aa] FunctionWrappersWrappers v0.1.3
⌃ [46192b85] GPUArraysCore v0.1.6
  [86223c79] Graphs v1.12.0
  [3e5b6fbb] HostCPUFeatures v0.1.17
  [615f187c] IfElse v0.1.1
  [d25df0c9] Inflate v0.1.5
  [3587e190] InverseFunctions v0.1.17
  [92d709cd] IrrationalConstants v0.2.2
  [82899510] IteratorInterfaceExtensions v1.0.0
  [692b3bcd] JLLWrappers v1.6.1
  [ef3ab10e] KLU v0.6.0
  [ba0b0d4f] Krylov v0.9.8
  [10f19ff3] LayoutPointers v0.1.17
  [5078a376] LazyArrays v2.2.1
  [87fe0de2] LineSearch v0.1.4
  [d3d80556] LineSearches v7.3.0
  [7ed4a6bd] LinearSolve v2.36.2
  [2ab3a3ac] LogExpFunctions v0.3.28
  [bdcacae8] LoopVectorization v0.12.171
  [d8e11817] MLStyle v0.4.17
  [1914dd2f] MacroTools v0.5.13
  [d125e4d3] ManualMemory v0.1.8
  [bb5d69b7] MaybeInplace v0.1.4
  [46d2c3a1] MuladdMacro v0.2.4
  [d41bc354] NLSolversBase v7.8.3
  [77ba4419] NaNMath v1.0.2
⌅ [8913a72c] NonlinearSolve v3.15.1
  [6fe1bfb0] OffsetArrays v1.14.1
  [bac558e1] OrderedCollections v1.6.3
  [bbf590c4] OrdinaryDiffEqCore v1.9.0
  [4302a76b] OrdinaryDiffEqDifferentiation v1.1.0
  [127b3ac7] OrdinaryDiffEqNonlinearSolve v1.2.2
⌃ [43230ef6] OrdinaryDiffEqRosenbrock v1.1.1
  [65ce6f38] PackageExtensionCompat v1.0.2
  [d96e819e] Parameters v0.12.3
  [f517fe37] Polyester v0.7.16
  [1d0040c9] PolyesterWeave v0.2.2
  [d236fae5] PreallocationTools v0.4.24
  [aea7be01] PrecompileTools v1.2.1
  [21216c6a] Preferences v1.4.3
  [3cdcf5f2] RecipesBase v1.3.4
  [731186ca] RecursiveArrayTools v3.27.3
  [f2c3362d] RecursiveFactorization v0.2.23
  [189a3867] Reexport v1.2.2
  [ae029012] Requires v1.3.0
  [7e49a35a] RuntimeGeneratedFunctions v0.5.13
  [94e857df] SIMDTypes v0.1.0
  [476501e8] SLEEFPirates v0.6.43
  [0bca4576] SciMLBase v2.58.1
  [19f34311] SciMLJacobianOperators v0.1.1
  [c0aeaf25] SciMLOperators v0.3.12
  [53ae85a6] SciMLStructures v1.5.0
  [efcf1570] Setfield v1.1.1
⌅ [727e6d20] SimpleNonlinearSolve v1.12.3
  [699a6c99] SimpleTraits v0.9.4
  [ce78b400] SimpleUnPack v1.1.0
  [9f842d2f] SparseConnectivityTracer v0.6.8
  [47a9eef4] SparseDiffTools v2.23.0
  [0a514795] SparseMatrixColorings v0.4.8
  [e56a9233] Sparspak v0.3.9
  [276daf66] SpecialFunctions v2.4.0
  [aedffcd0] Static v1.1.1
  [0d7ed370] StaticArrayInterface v1.8.0
  [90137ffa] StaticArrays v1.9.8
  [1e83bf80] StaticArraysCore v1.4.3
  [7792a7ef] StrideArraysCore v0.5.7
  [2efcf032] SymbolicIndexingInterface v0.3.34
  [3783bdb8] TableTraits v1.0.1
  [bd369af6] Tables v1.12.0
  [8290d209] ThreadingUtilities v0.5.2
  [a759f4b9] TimerOutputs v0.5.25
  [d5829a12] TriangularSolve v0.2.1
  [781d530d] TruncatedStacktraces v1.4.0
  [3a884ed6] UnPack v1.0.2
  [3d5dd08c] VectorizationBase v0.21.71
  [19fa3120] VertexSafeGraphs v0.2.0
  [1d5cc7b8] IntelOpenMP_jll v2024.2.1+0
  [856f044c] MKL_jll v2024.2.0+0
  [efe28fd5] OpenSpecFun_jll v0.5.5+0
  [1317d2d5] oneTBB_jll v2021.12.0+0
  [0dad84c5] ArgTools v1.1.1
  [56f22d72] Artifacts
  [2a0f44e3] Base64
  [ade2ca70] Dates
  [8ba89e20] Distributed
  [f43a241f] Downloads v1.6.0
  [7b1f6079] FileWatching
  [9fa8497b] Future
  [b77e0a4c] InteractiveUtils
  [4af54fe1] LazyArtifacts
  [b27032c2] LibCURL v0.6.4
  [76f85450] LibGit2
  [8f399da3] Libdl
  [37e2e46d] LinearAlgebra
  [56ddb016] Logging
  [d6f4376e] Markdown
  [a63ad114] Mmap
  [ca575930] NetworkOptions v1.2.0
  [44cfe95a] Pkg v1.10.0
  [de0858da] Printf
  [3fa0cd96] REPL
  [9a3f8284] Random
  [ea8e919c] SHA v0.7.0
  [9e88b42a] Serialization
  [1a1011a3] SharedArrays
  [6462fe0b] Sockets
  [2f01184e] SparseArrays v1.10.0
  [10745b16] Statistics v1.10.0
  [fa267f1f] TOML v1.0.3
  [a4e569a6] Tar v1.10.0
  [8dfed614] Test
  [cf7118a7] UUIDs
  [4ec0a83e] Unicode
  [e66e0078] CompilerSupportLibraries_jll v1.0.5+1
  [deac9b47] LibCURL_jll v8.4.0+0
  [e37daf67] LibGit2_jll v1.6.4+0
  [29816b5a] LibSSH2_jll v1.11.0+1
  [c8ffd9c3] MbedTLS_jll v2.28.2+1
  [14a3606d] MozillaCACerts_jll v2023.1.10
  [4536629a] OpenBLAS_jll v0.3.23+2
  [05823500] OpenLibm_jll v0.8.1+2
  [bea87d4a] SuiteSparse_jll v7.2.1+1
  [83775a58] Zlib_jll v1.2.13+1
  [8e850b90] libblastrampoline_jll v5.8.0+1
  [8e850ede] nghttp2_jll v1.52.0+1
  [3f19e933] p7zip_jll v17.4.0+2

• Output of versioninfo()

Julia Version 1.10.0
Commit 3120989f39 (2023-12-25 18:01 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 8 × 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, tigerlake)
  Threads: 1 on 8 virtual cores
Environment:
  JULIA_CONDAPKG_BACKEND = Null
  JULIA_PYTHONCALL_EXE = C:\Users\iwheeler\Miniconda3\python.exe

Additional context

[oscardssmith]

you need OrdinaryDiffEqNonlinearSolve and OrdinaryDiffEqRosenbrock for singular me matrices

[ChrisRackauckas]

Yeah it has a special error message for this, I wonder why it's not hit here.

[Ickaser]

you need OrdinaryDiffEqNonlinearSolve and OrdinaryDiffEqRosenbrock for singular me matrices

Just to confirm this, Installing OrdinaryDiffEqNonlinearSolve alone isn't enough, I also have to import it. But then it does run as it should.

[Ickaser]

Yeah it has a special error message for this, I wonder why it's not hit here.

Based on a close reading of https://github.com/SciML/OrdinaryDiffEq.jl/blob/a849f328da10f39be9f4b60fa13aa712375061e3/lib/OrdinaryDiffEqCore/src/initialize_dae.jl, here is what I have pieced together:

• There is an error message with this information, but it lives inside OrdinaryDiffEqCore.default_nlsolve
• default_nlsolve is only called inside _initialize_dae!
• In OrdinaryDiffEqCore, there exist methods of _initialize_dae! for ::NoInit and ::CheckInit, but not for ::BrownFullBasicInit

Indeed, if I adjust the example so that we use NoInit(), it runs and returns a solution, on OrdinaryDiffEqRosenbrock 1.2 without OrdinaryDiffEqNonlinearSolve installed

julia> pr = ODEProblem(dae_f, [1.0, -1.0], (0.0, 1.0), initialzealg=OrdinaryDiffEqRosenbrock.SciMLBase.NoInit())
julia> solve(pr, Rosenbrock23())

retcode: Success
Interpolation: specialized 2nd order "free" stiffness-aware interpolation
t: 14-element Vector{Float64}:
 0.0
 1.0e-6
 1.1e-5
 0.00011099999999999999
 0.0011109999999999998
 0.011110999999999996
 0.06683274154492563
 0.12255448308985126
 0.23458930091053964
 0.346624118731228
 0.5123338263199448
 0.6780435339086617
 0.8849787889379794
 1.0
u: 14-element Vector{Vector{Float64}}:
 [1.0, -1.0]
 [0.9999990000005, -0.9999990000005]
 [0.9999890000604997, -0.9999890000604997]
 [0.9998890061602316, -0.9998890061602316]
 [0.998889616891569, -0.998889616891569]
 [0.9889504591072803, -0.9889504591072803]
 [0.9353450167194357, -0.9353450167194357]
 [0.884645223878678, -0.884645223878678]
 [0.7908389642917913, -0.7908389642917913]
 [0.7069797592982714, -0.7069797592982714]
 [0.5989062717031488, -0.5989062717031488]
 [0.5073535947357113, -0.5073535947357113]
 [0.412364026329937, -0.412364026329937]
 [0.36753665558720594, -0.36753665558720594]

And if I pass it an invalid initial condition, it will still solve, with a correct solution for the algebraic variable except at the initial condition (which I guess might be expected, but is somewhat disconcerting).

julia> pr = ODEProblem(dae_f, [1.0, 0.0], (0.0, 1.0), initialzealg=OrdinaryDiffEqRosenbrock.SciMLBase.NoInit())
julia> solve(pr, Rosenbrock23())
retcode: Success
Interpolation: specialized 2nd order "free" stiffness-aware interpolation
t: 14-element Vector{Float64}:
 0.0
 1.0e-6
 1.1e-5
 0.00011099999999999999
 0.0011109999999999998
 0.011110999999999996
 0.0668326888361821
 0.1225543776723642
 0.23458911814501143
 0.34662385861765865
 0.5123335359943582
 0.6780432133710577
 0.8849784513102263
 1.0
u: 14-element Vector{Vector{Float64}}:
 [1.0, 0.0]
 [0.9999990000005, -0.9999990000005006]
 [0.9999890000604997, -0.9999890000604995]
 [0.9998890061602316, -0.9998890061602318]
 [0.998889616891569, -0.9988896168915689]
 [0.9889504591072803, -0.9889504591072802]
 [0.9353450660390021, -0.935345066039002]
 [0.8846453171711408, -0.8846453171711407]
 [0.7908391089561135, -0.7908391089561134]
 [0.7069799433906985, -0.7069799433906983]
 [0.5989064458099173, -0.598906445809917]
 [0.5073537576078662, -0.5073537576078659]
 [0.41236416579338064, -0.4123641657933806]
 [0.3675366555969062, -0.3675366555969061]

So it seems to me like the default init shouldn't be BrownFullBasicInit() unless OrdinaryDiffEqNonlinearSolve is loaded, maybe? Or there should be a method in OrdinaryDiffEqCore._initialize_dae! that handles ::BrownFullBasicInit().

[Ickaser]

Contemplating how this would be fixed: should there be a method in OrdinaryDiffEqCore._initialize_dae! for ::BrownFullBasicInit(), which throws an appropriate error, that is overwritten/invalidated by a method in OrdinaryDiffEqNonlinearSolve which actually does the work? (Maybe that's an ugly hack, just thinking out loud.)

Oh, but we were supposed to hit an error, and in this case I managed to get a solution without an error. So maybe the error needs to move further up the call stack to _initialize_dae! instead of in default_nlsolve?

[ChrisRackauckas]

We can check hasmethod and throw an informative error if false

[Ickaser]

Okay, took a stab at a pull request which makes a change of this sort. I'm still relatively inexperienced with this kind of contribution, so I'm happy to make whatever changes are necessary. (Haven't done the code formatting step yet, but I assume that more changes will be needed anyway to my solution before it will get merged.)

A preliminary test indicates that with the above MWE, that pull request triggers the appropriate error if OrdinaryDiffEqNonlinearSolve isn't installed, but still triggers the error if ODENonlinearSolve is loaded, so I know I have it wrong. Will take a look later.

[Ickaser]

The last pull request related to this is #2602, which is a breaking change for v7, but the problem/question here is answered to my satisfaction.