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SciML / MethodOfLines.jl

Automatic Finite Difference PDE solving with Julia SciML
https://docs.sciml.ai/MethodOfLines/stable/
MIT License
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Tutorial example "Adding parameters" errors #411

Closed Eben60 closed 1 week ago

Eben60 commented 2 weeks ago

Describe the bug 🐞

Example copied from Tutorial (the 1st code on the page) errors

Error & Stacktrace ⚠️

The system of equations is:

Discretization failed, please post an issue on https://github.com/SciML/MethodOfLines.jl with the failing code and system at low point count.

ERROR: MethodError: no method matching hasmetadata(::Pair{Num, Float64}, ::Type{Symbolics.VariableDefaultValue})

Closest candidates are:
  hasmetadata(::Num, ::Any)
   @ Symbolics ~/.julia/packages/Symbolics/qKoME/src/Symbolics.jl:187
  hasmetadata(::Complex{Num}, ::Any)
   @ Symbolics ~/.julia/packages/Symbolics/qKoME/src/Symbolics.jl:187
  hasmetadata(::SymbolicUtils.Symbolic, ::Any)
   @ SymbolicUtils ~/.julia/packages/SymbolicUtils/cLLXc/src/types.jl:598

Stacktrace:
 [1] hasdefault(v::Pair{Num, Float64})
   @ ModelingToolkit ~/.julia/packages/ModelingToolkit/GJiqn/src/utils.jl:237
 [2] collect_defaults!
   @ ~/.julia/packages/ModelingToolkit/GJiqn/src/utils.jl:255 [inlined]
 [3] process_variables!(var_to_name::Dict{Any, Any}, defs::Dict{Any, Any}, vars::Vector{Pair{Num, Float64}})
   @ ModelingToolkit ~/.julia/packages/ModelingToolkit/GJiqn/src/utils.jl:248
 [4] ODESystem(deqs::Vector{…}, iv::Num, dvs::Vector{…}, ps::Vector{…}; controls::Vector{…}, observed::Vector{…}, systems::Vector{…}, tspan::Nothing, name::Symbol, default_u0::Dict{…}, default_p::Dict{…}, defaults::Dict{…}, guesses::Dict{…}, initializesystem::Nothing, initialization_eqs::Vector{…}, schedule::Nothing, connector_type::Nothing, preface::Nothing, continuous_events::Nothing, discrete_events::Nothing, parameter_dependencies::Nothing, checks::Bool, metadata::MethodOfLines.MOLMetadata{…}, gui_metadata::Nothing)
   @ ModelingToolkit ~/.julia/packages/ModelingToolkit/GJiqn/src/systems/diffeqs/odesystem.jl:245
 [5] generate_system(disc_state::PDEBase.EquationState, s::MethodOfLines.DiscreteSpace{…}, u0::Vector{…}, tspan::Tuple{…}, metadata::MethodOfLines.MOLMetadata{…}, disc::MOLFiniteDifference{…})
   @ PDEBase ~/.julia/packages/PDEBase/o7LGc/src/discretization_state.jl:40
 [6] symbolic_discretize(pdesys::PDESystem, discretization::MOLFiniteDifference{…})
   @ PDEBase ~/.julia/packages/PDEBase/o7LGc/src/symbolic_discretize.jl:89
 [7] discretize(pdesys::PDESystem, discretization::MOLFiniteDifference{…}; analytic::Nothing, kwargs::@Kwargs{})
   @ PDEBase ~/.julia/packages/PDEBase/o7LGc/src/discretization_state.jl:57
 [8] discretize(pdesys::PDESystem, discretization::MOLFiniteDifference{…})
   @ PDEBase ~/.julia/packages/PDEBase/o7LGc/src/discretization_state.jl:54
 [9] top-level scope
   @ ~/Julia/MetsodOfLinesTests/MeOfLi.jl/src/adding_parameters_example.jl:24
Some type information was truncated. Use `show(err)` to see complete types.

Environment (please complete the following information):

Status `~/Julia/MetsodOfLinesTests/MeOfLi.jl/Project.toml`
  [0c46a032] DifferentialEquations v7.14.0
  [5b8099bc] DomainSets v0.7.14
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  [94925ecb] MethodOfLines v0.11.2
⌃ [961ee093] ModelingToolkit v9.32.0
  [1dea7af3] OrdinaryDiffEq v6.89.0
  [91a5bcdd] Plots v1.40.8
Info Packages marked with ⌃ have new versions available and may be upgradable.
using Pkg; Pkg.status(; mode = PKGMODE_MANIFEST)
Status `~/Julia/MetsodOfLinesTests/MeOfLi.jl/Manifest.toml`
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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`

(MeOfLi.jl) pkg> status --outdated -m
Status `~/Julia/MetsodOfLinesTests/MeOfLi.jl/Manifest.toml`
⌅ [187b0558] ConstructionBase v1.5.6 (<v1.5.8): SymbolicUtils
⌅ [7c1d4256] DynamicPolynomials v0.5.7 (<v0.6.0): SymbolicUtils, Symbolics
⌅ [06fc5a27] DynamicQuantities v0.13.2 (<v1.0.0): ModelingToolkit
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⌃ [961ee093] ModelingToolkit v9.32.0 (<v9.36.0)
⌃ [19f23fe9] SymbolicLimits v0.2.1 (<v0.2.2)
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⌅ [f50d1b31] Rmath_jll v0.4.3+0 (<v0.5.0+0): Rmath

Julia Version 1.10.5
Commit 6f3fdf7b362 (2024-08-27 14:19 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: macOS (arm64-apple-darwin22.4.0)
  CPU: 8 × Apple M1
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, apple-m1)
Threads: 6 default, 0 interactive, 3 GC (on 4 virtual cores)
Environment:
  JULIA_EDITOR = code
  JULIA_NUM_THREADS = 6
ChrisRackauckas commented 1 week ago

See https://github.com/SciML/MethodOfLines.jl/issues/249#issuecomment-2323735521. We need to fix the docs