This worked up until recently but errors now:
using Distributed
using ModelingToolkitBase
using OrdinaryDiffEqTsit5
using SciMLBase
@independent_variables t
@variables x(t)
@parameters k
D = Differential(t)
@named sys = System([D(x) ~ -k * x], t)
sys = mtkcompile(sys)
f_expr = SciMLBase.ODEFunction{true, SciMLBase.FullSpecialize}(
sys; iip_config = (false, true), expression = Val{true},
)
f = @eval $f_expr
prob = ODEProblem(f, [1.0], (0.0, 1.0), [1.0])
solve(prob, Tsit5())
addprocs(1)
@everywhere using ModelingToolkitBase, OrdinaryDiffEqTsit5
sol = remotecall_fetch(solve, 2, prob, Tsit5())ERROR: On worker 2:
UndefVarError: `#unimplemented` not defined in `Main`
Suggestion: define the const at top-level before running function that uses it (stricter Julia v1.12+ rule).
Note: the binding state changed since the error occurred (was: 11, now: 0).
Stacktrace:
[1] deserialize_datatype
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:1544
[2] handle_deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:904
[3] deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:851
[4] deserialize_datatype
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:1568
[5] handle_deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:904
[6] deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:851
[7] deserialize_datatype
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:1568
[8] handle_deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:904
[9] deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:851
[10] deserialize_datatype
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:1568
[11] handle_deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:904
[12] deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:851
[13] handle_deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:919
[14] deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:851
[15] #deserialize_tuple##0
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:1010
[16] ntupleany
@ ./ntuple.jl:45
[17] deserialize_tuple
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:1010
[18] handle_deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:894
[19] deserialize
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Serialization/src/Serialization.jl:851 [inlined]
[20] deserialize_msg
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Distributed/src/messages.jl:87
[21] message_handler_loop
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Distributed/src/process_messages.jl:176
[22] process_tcp_streams
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Distributed/src/process_messages.jl:133
[23] #process_messages##0
@ ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Distributed/src/process_messages.jl:121
Stacktrace:
[1] remotecall_fetch(::Function, ::Distributed.Worker, ::ODEProblem{…}, ::Vararg{…}; kwargs::@Kwargs{})
@ Distributed ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Distributed/src/remotecall.jl:465
[2] remotecall_fetch(::Function, ::Distributed.Worker, ::ODEProblem{…}, ::Vararg{…})
@ Distributed ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Distributed/src/remotecall.jl:454
[3] remotecall_fetch(::Function, ::Int64, ::ODEProblem{…}, ::Vararg{…}; kwargs::@Kwargs{})
@ Distributed ~/.julia/juliaup/julia-1.12.6+0.aarch64.apple.darwin14/Julia-1.12.app/Contents/Resources/julia/share/julia/stdlib/v1.12/Distributed/src/remotecall.jl:492
[4] top-level scope
@ /private/tmp/mwe1_mtkbase_distributed/mwe1.jl:23
Some type information was truncated. Use `show(err)` to see complete types.julia> versioninfo()
Julia Version 1.12.6
Commit 15346901f00 (2026-04-09 19:20 UTC)
Build Info:
Official https://julialang.org release
Platform Info:
OS: macOS (arm64-apple-darwin24.0.0)
CPU: 10 × Apple M2 Pro
WORD_SIZE: 64
LLVM: libLLVM-18.1.7 (ORCJIT, apple-m2)
GC: Built with stock GC
Threads: 4 default, 1 interactive, 4 GC (on 6 virtual cores)
Environment:
JULIA_EDITOR = code
JULIA_VSCODE_REPL = 1
JULIA_NUM_THREADS = 4
JULIA_PKG_USE_CLI_GIT = true
JULIA_PKG_PRESERVE_TIERED_INSTALLED = true
JULIA_PKG_SERVER_REGISTRY_PREFERENCE = true
(mwe1_mtkbase_distributed) pkg> st --manifest
Status `/private/tmp/mwe1_mtkbase_distributed/Manifest.toml`
[47edcb42] ADTypes v1.21.0
[6e696c72] AbstractPlutoDingetjes v1.3.2
[1520ce14] AbstractTrees v0.4.5
[7d9f7c33] Accessors v0.1.44
[79e6a3ab] Adapt v4.5.2
[ec485272] ArnoldiMethod v0.4.0
[4fba245c] ArrayInterface v7.24.0
[4c555306] ArrayLayouts v1.12.2
[aae01518] BandedMatrices v1.11.0
[e2ed5e7c] Bijections v0.2.2
[caf10ac8] BipartiteGraphs v0.1.7
[62783981] BitTwiddlingConvenienceFunctions v0.1.6
[8e7c35d0] BlockArrays v1.9.3
[70df07ce] BracketingNonlinearSolve v1.12.1
[2a0fbf3d] CPUSummary v0.2.7
[fb6a15b2] CloseOpenIntervals v0.1.13
⌅ [861a8166] Combinatorics v1.0.2
[38540f10] CommonSolve v0.2.6
[bbf7d656] CommonSubexpressions v0.3.1
[f70d9fcc] CommonWorldInvalidations v1.0.0
[34da2185] Compat v4.18.1
[b152e2b5] CompositeTypes v0.1.4
[a33af91c] CompositionsBase v0.1.2
[2569d6c7] ConcreteStructs v0.2.3
[187b0558] ConstructionBase v1.6.0
[adafc99b] CpuId v0.3.1
[864edb3b] DataStructures v0.19.4
[85a47980] Dictionaries v0.4.6
[2b5f629d] DiffEqBase v6.218.0
[459566f4] DiffEqCallbacks v4.15.0
[163ba53b] DiffResults v1.1.0
[b552c78f] DiffRules v1.15.1
[a0c0ee7d] DifferentiationInterface v0.7.16
[ffbed154] DocStringExtensions v0.9.5
⌅ [5b8099bc] DomainSets v0.7.18
[7c1d4256] DynamicPolynomials v0.6.6
[4e289a0a] EnumX v1.0.7
[f151be2c] EnzymeCore v0.8.19
[e2ba6199] ExprTools v0.1.10
[55351af7] ExproniconLite v0.10.14
[7034ab61] FastBroadcast v1.3.1
[9aa1b823] FastClosures v0.3.2
[a4df4552] FastPower v1.3.1
[1a297f60] FillArrays v1.16.0
[64ca27bc] FindFirstFunctions v1.8.0
[6a86dc24] FiniteDiff v2.30.0
[f6369f11] ForwardDiff v1.3.3
[a85aefff] FunctionMaps v0.1.2
[069b7b12] FunctionWrappers v1.1.3
[77dc65aa] FunctionWrappersWrappers v1.5.0
[46192b85] GPUArraysCore v0.2.0
[86223c79] Graphs v1.14.0
[615f187c] IfElse v0.1.1
[3263718b] ImplicitDiscreteSolve v1.11.0
[313cdc1a] Indexing v1.1.1
[d25df0c9] Inflate v0.1.5
[18e54dd8] IntegerMathUtils v0.1.3
[8197267c] IntervalSets v0.7.14
[3587e190] InverseFunctions v0.1.17
[92d709cd] IrrationalConstants v0.2.6
[82899510] IteratorInterfaceExtensions v1.0.0
[692b3bcd] JLLWrappers v1.7.1
[ae98c720] Jieko v0.2.1
[ccbc3e58] JumpProcesses v9.25.1
[ba0b0d4f] Krylov v0.10.6
[10f19ff3] LayoutPointers v0.1.17
[87fe0de2] LineSearch v0.1.8
[7ed4a6bd] LinearSolve v3.75.0
[2ab3a3ac] LogExpFunctions v0.3.29
[e6f89c97] LoggingExtras v1.2.0
[1914dd2f] MacroTools v0.5.16
[d125e4d3] ManualMemory v0.1.8
[bb5d69b7] MaybeInplace v0.1.4
[7771a370] ModelingToolkitBase v1.30.0
[2e0e35c7] Moshi v0.3.7
[46d2c3a1] MuladdMacro v0.2.4
[102ac46a] MultivariatePolynomials v0.5.18
[d8a4904e] MutableArithmetics v1.7.1
[77ba4419] NaNMath v1.1.3
[be0214bd] NonlinearSolveBase v2.25.0
[5959db7a] NonlinearSolveFirstOrder v2.1.1
[6fe1bfb0] OffsetArrays v1.17.0
[bac558e1] OrderedCollections v1.8.1
[bbf590c4] OrdinaryDiffEqCore v3.33.0
[b1df2697] OrdinaryDiffEqTsit5 v1.12.0
[e409e4f3] PoissonRandom v0.4.7
[f517fe37] Polyester v0.7.19
[1d0040c9] PolyesterWeave v0.2.2
[d236fae5] PreallocationTools v1.2.0
[aea7be01] PrecompileTools v1.3.3
[21216c6a] Preferences v1.5.2
[27ebfcd6] Primes v0.5.7
[988b38a3] ReadOnlyArrays v0.2.0
[795d4caa] ReadOnlyDicts v1.0.1
[3cdcf5f2] RecipesBase v1.3.4
⌅ [731186ca] RecursiveArrayTools v3.54.0
[189a3867] Reexport v1.2.2
[ae029012] Requires v1.3.1
[7e49a35a] RuntimeGeneratedFunctions v0.5.18
[9dfe8606] SCCNonlinearSolve v1.13.0
[94e857df] SIMDTypes v0.1.0
⌅ [0bca4576] SciMLBase v2.155.0
[19f34311] SciMLJacobianOperators v0.1.13
[a6db7da4] SciMLLogging v1.9.1
[c0aeaf25] SciMLOperators v1.16.0
[431bcebd] SciMLPublic v1.0.1
[53ae85a6] SciMLStructures v1.10.0
[efcf1570] Setfield v1.1.2
[727e6d20] SimpleNonlinearSolve v2.11.1
[699a6c99] SimpleTraits v0.9.5
[276daf66] SpecialFunctions v2.7.2
[0c0c59c1] StarAlgebras v0.3.0
[aedffcd0] Static v1.3.1
[0d7ed370] StaticArrayInterface v1.9.0
[90137ffa] StaticArrays v1.9.18
[1e83bf80] StaticArraysCore v1.4.4
[10745b16] Statistics v1.11.1
[7792a7ef] StrideArraysCore v0.5.8
[2efcf032] SymbolicIndexingInterface v0.3.46
[19f23fe9] SymbolicLimits v1.1.0
[d1185830] SymbolicUtils v4.24.2
[0c5d862f] Symbolics v7.19.0
[ed4db957] TaskLocalValues v0.1.3
[8ea1fca8] TermInterface v2.0.0
[8290d209] ThreadingUtilities v0.5.5
[a759f4b9] TimerOutputs v0.5.29
[781d530d] TruncatedStacktraces v1.4.0
[3a884ed6] UnPack v1.0.2
[d30d5f5c] WeakCacheSets v0.1.0
[1d5cc7b8] IntelOpenMP_jll v2025.2.0+0
[856f044c] MKL_jll v2025.2.0+0
[efe28fd5] OpenSpecFun_jll v0.5.6+0
[1317d2d5] oneTBB_jll v2022.0.0+1
[0dad84c5] ArgTools v1.1.2
[56f22d72] Artifacts v1.11.0
[2a0f44e3] Base64 v1.11.0
[ade2ca70] Dates v1.11.0
[8ba89e20] Distributed v1.11.0
[f43a241f] Downloads v1.7.0
[7b1f6079] FileWatching v1.11.0
[9fa8497b] Future v1.11.0
[b77e0a4c] InteractiveUtils v1.11.0
[ac6e5ff7] JuliaSyntaxHighlighting v1.12.0
[4af54fe1] LazyArtifacts v1.11.0
[b27032c2] LibCURL v0.6.4
[76f85450] LibGit2 v1.11.0
[8f399da3] Libdl v1.11.0
[37e2e46d] LinearAlgebra v1.12.0
[56ddb016] Logging v1.11.0
[d6f4376e] Markdown v1.11.0
[ca575930] NetworkOptions v1.3.0
[44cfe95a] Pkg v1.12.1
[de0858da] Printf v1.11.0
[3fa0cd96] REPL v1.11.0
[9a3f8284] Random v1.11.0
[ea8e919c] SHA v0.7.0
[9e88b42a] Serialization v1.11.0
[6462fe0b] Sockets v1.11.0
[2f01184e] SparseArrays v1.12.0
[f489334b] StyledStrings v1.11.0
[fa267f1f] TOML v1.0.3
[a4e569a6] Tar v1.10.0
[8dfed614] Test v1.11.0
[cf7118a7] UUIDs v1.11.0
[4ec0a83e] Unicode v1.11.0
[e66e0078] CompilerSupportLibraries_jll v1.3.0+1
[deac9b47] LibCURL_jll v8.15.0+0
[e37daf67] LibGit2_jll v1.9.0+0
[29816b5a] LibSSH2_jll v1.11.3+1
[14a3606d] MozillaCACerts_jll v2025.11.4
[4536629a] OpenBLAS_jll v0.3.29+0
[05823500] OpenLibm_jll v0.8.7+0
[458c3c95] OpenSSL_jll v3.5.4+0
[bea87d4a] SuiteSparse_jll v7.8.3+2
[83775a58] Zlib_jll v1.3.1+2
[8e850b90] libblastrampoline_jll v5.15.0+0
[8e850ede] nghttp2_jll v1.64.0+1
[3f19e933] p7zip_jll v17.7.0+0
Info Packages marked with ⌅ have new versions available but compatibility constraints restrict them from upgrading. To see why use `status --outdated -m`
This worked up until recently but errors now: