MWE:
using DifferentialEquations
using ModelingToolkit
@variables t x(t) RHS(t)
@parameters τ
D = Differential(t)
eqs = [
RHS ~ (1 - x) / τ
D(x) ~ RHS
]
@named sys = ODESystem(eqs, defaults=[x=>0.0, τ=>3.0])
sys = structural_simplify(sys)
prob = ODEProblem(sys, [], (0.0, 10.0))
sol = solve(prob)
sol[sys.x]
sol[sys.RHS]
ssprob = SteadyStateProblem(sys, [])
sssol = solve(ssprob, DynamicSS(Rodas5()))
sssol[sys.x]
sssol[sys.RHS] # MethodError: No method matching... (details below)
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: 16 × AMD Ryzen 7 6800H with Radeon Graphics
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-15.0.7 (ORCJIT, znver3)
Threads: 23 on 16 virtual cores
Pkg.status() :
Status `D:\github\test\Project.toml`
[0c46a032] DifferentialEquations v7.12.0
[961ee093] ModelingToolkit v8.75.0
Manifest
Status `D:\github\test\Manifest.toml`
[47edcb42] ADTypes v0.2.6
[1520ce14] AbstractTrees v0.4.4
⌅ [79e6a3ab] Adapt v3.7.2
[ec485272] ArnoldiMethod v0.2.0
[4fba245c] ArrayInterface v7.7.0
[4c555306] ArrayLayouts v1.5.1
[aae01518] BandedMatrices v1.4.0
[e2ed5e7c] Bijections v0.1.6
[62783981] BitTwiddlingConvenienceFunctions v0.1.5
⌃ [764a87c0] BoundaryValueDiffEq v5.6.0
[fa961155] CEnum v0.5.0
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[49dc2e85] Calculus v0.5.1
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[459566f4] DiffEqCallbacks v2.36.1
[77a26b50] DiffEqNoiseProcess v5.20.0
[163ba53b] DiffResults v1.1.0
[b552c78f] DiffRules v1.15.1
[0c46a032] DifferentialEquations v7.12.0
[b4f34e82] Distances v0.10.11
[31c24e10] Distributions v0.25.106
[ffbed154] DocStringExtensions v0.9.3
⌅ [5b8099bc] DomainSets v0.6.7
[fa6b7ba4] DualNumbers v0.6.8
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[e2ba6199] ExprTools v0.1.10
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⌃ [46192b85] GPUArraysCore v0.1.5
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[65ce6f38] PackageExtensionCompat v1.0.2
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[21216c6a] Preferences v1.4.1
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Info Packages marked with ⌃ and ⌅ have new versions available. Those with ⌃ may be upgradable, but those with ⌅ are restricted by compatibility constraints from upgrading. To see why use `status --outdated -m`
show(err)
1-element ExceptionStack:
LoadError: MethodError: no method matching (::SciMLBase.var"#187#189"{ODEFunction{true, SciMLBase.AutoSpecialize, ModelingToolkit.var"#k#503"{RuntimeGeneratedFunctions.RuntimeGeneratedFunction{(:ˍ₋arg1, :ˍ₋arg2, :t), ModelingToolkit.var"#_RGF_ModTag", ModelingToolkit.var"#_RGF_ModTag", (0x66fdb9d8, 0x7065c0d5, 0xc5193f8f, 0x42e87a59, 0x20f809cd), Nothing}, RuntimeGeneratedFunctions.RuntimeGeneratedFunction{(:ˍ₋out, :ˍ₋arg1, :ˍ₋arg2, :t), ModelingToolkit.var"#_RGF_ModTag", ModelingToolkit.var"#_RGF_ModTag", (0xf649ba8a, 0xa091b803, 0x21fee2a4, 0xeaade6c7, 0xa4cf5818), Nothing}}, LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, ModelingToolkit.var"#generated_observed#510"{ODESystem, Dict{Any, Any}, Vector{SymbolicUtils.BasicSymbolic{Real}}}, Nothing, ODESystem}, Num})(::Vector{Float64}, ::Vector{Float64})