LoadError: MethodError: no method matching copy(::StochasticPrograms.SingleDecisionSet{Float64})

[kurtulus-ercan]

Hi Martin,

I am trying to reproduce farmer example. Excact model is below:

########################################## using GLPK using StochasticPrograms

farmer_model = @stochastic_model begin @stage 1 begin @parameters begin Crops = [:wheat, :corn, :beets] Cost = Dict(:wheat=>150, :corn=>230, :beets=>260) Budget = 500 end @decision(model, x[c in Crops] >=0, integer=true) @objective(model, Min, sum(Cost[c]x[c] for c in Crops)) @constraint(model, sum(x[c] for c in Crops) <= Budget) @constraint(model, sum(x[c] for c in Crops) <= Budget) end @stage 2 begin @parameters begin Crops = [:wheat, :corn, :beets] Required = Dict(:wheat=>200, :corn=>240, :beets=>0) PurchasePrice = Dict(:wheat=>238, :corn=>210) SellPrice = Dict(:wheat=>170, :corn=>150, :beets=>36, :extra_beets=>10) end @uncertain ξ[c in Crops] @variable(model, y[p in setdiff(Crops, [:beets])] >= 0) @variable(model, w[s in Crops ∪ [:extra_beets]] >= 0) @objective(model, Min, sum(PurchasePrice[p] y[p] for p in setdiff(Crops, [:beets]))

• sum(SellPrice[s] w[s] for s in Crops ∪ [:extra_beets])) @constraint(model, minimum_requirement[p in setdiff(Crops, [:beets])], ξ[p] x[p] + y[p] - w[p] >= Required[p]) @constraint(model, minimum_requirement_beets, ξ[:beets] * x[:beets] - w[:beets] - w[:extra_beets] >= Required[:beets]) @constraint(model, beets_quota, w[:beets] <= 6000) end end

ξ₁ = Scenario(wheat = 3.0, corn = 3.6, beets = 24.0, probability = 1/3) ξ₂ = Scenario(wheat = 2.5, corn = 3.0, beets = 20.0, probability = 1/3) ξ₃ = Scenario(wheat = 2.0, corn = 2.4, beets = 16.0, probability = 1/3)

farmer = instantiate(farmer_model, [ξ₁,ξ₂,ξ₃], optimizer = GLPK.Optimizer)

###################################

I get an error. Error message is below:

################################### LoadError: MethodError: no method matching copy(::StochasticPrograms.SingleDecisionSet{Float64}) Closest candidates are: copy(::BenchmarkTools.Parameters) at C:\Users\Ercan.julia\packages\BenchmarkTools\eCEpo\src\parameters.jl:60 copy(::SingleKnown) at C:\Users\Ercan.julia\packages\StochasticPrograms\g8Qnj\src\types\decisions\functions\decisions.jl:22 copy(::LinearAlgebra.Transpose{Bool,BitArray{2}}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\LinearAlgebra\src\bitarray.jl:226 ... ##########################

When I run the code line by line, I get following error at end of the line:

##################### farmer = instantiate(farmer_model, [ξ₁,ξ₂,ξ₃], optimizer = GLPK.Optimizer) ##########################

Error displaying Atom.EvalError{MethodError}: BoundsError: attempt to access String at index [8]

Can you please help me about this issue?

Thank you in advance. Ercan

[martinbiel]

StochasticPrograms was unfortunately broken by the latest minor release of JuMP+MathOptInterface. Some of the issues are fixed on master but not yet all. Until I have it sorted the only option is to downgrade to prior versions of JuMP+MathOptInterface.

[kurtulus-ercan]

Thank you for your swift reply. Downgrading to MathOptInterface v0.9.14 is solved the problem.

[martinbiel]

The errors appear to be sorted out now. So the master branch should be compatible with the latest JuMP+MathOptInterface again.

[maramos874]

Still having the issue with MOI v0.9.17

[martinbiel]

Are you on the master branch?

[maramos874]

Yep, had to downgrade MOI to v0.9.14

[martinbiel]

Ok, I will check it out.

[martinbiel]

Works for me on v0.9.17, and seems fine on Travis as well. Can you send the output of versioninfo and Pkg.status()?

[maramos874]

Sure!

julia> versioninfo()
Julia Version 1.4.2
Commit 44fa15b150* (2020-05-23 18:35 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)
Environment:
  JULIA_PATH = /mnt/workspace/bin/julia-1.4.2/bin
  JULIA_DEPOT_PATH = /mnt/workspace/.julia

(@v1.4) pkg> status
Status `/mnt/workspace/.julia/environments/v1.4/Project.toml`
  [7c4d4715] AmplNLWriter v0.6.0
  [336ed68f] CSV v0.7.7
  [cdb1efd8] DSPopt v0.1.1
  [a93c6f00] DataFrames v0.21.7
  [2e9cd046] Gurobi v0.8.1
  [f67ccb44] HDF5 v0.13.6
  [b6b21f68] Ipopt v0.6.3
  [4138dd39] JLD v0.10.0
  [033835bb] JLD2 v0.2.3
  [682c06a0] JSON v0.21.1
  [4076af6c] JuMP v0.21.4
  [da04e1cc] MPI v0.15.1
  [b8f27783] MathOptInterface v0.9.14
  [76087f3c] NLopt v0.6.0
  [8b8459f2] StochasticPrograms v0.4.1
  [34f15cae] StructJuMP v0.2.0

Yesterday, another colleague had exactly the same problem in a Windows machine, just FYI.

Kind regards

[martinbiel]

It does not look like you are on the master branch. Did you run pgk> add StochasticPrograms#master?

[maramos874]

Now it works! Thanks!