function f(out,du,u,p,t)
    out[1] = - 0.04u[1]              + 1e4*u[2]*u[3] - du[1]
    out[2] = + 0.04u[1] - 3e7*u[2]^2 - 1e4*u[2]*u[3] - du[2]
    out[3] = u[1] + u[2] + u[3] - 1.0
end

function jac(J, du, u, p, gamma, t)
    J[1,1] = -0.04 - gamma
    J[1,2] = 1e4*u[3]
    J[1,3] = 1e4*u[2]
    J[2,1] = 0.04
    J[2,2] = -6e7*u[2] - 1e4*u[3] - gamma
    J[2,3] = -1e4*u[2]
    J[3,1] = 1.0
    J[3,2] = 1.0
    J[3,3] = 1.0
end

u₀ = [1.0, 0, 0]
du₀ = [-0.04, 0.04, 0.0]
tspan = (0.0,100000.0)

differential_vars = [true,true,false]
prob = DAEProblem(DAEFunction(f; jac),du₀,u₀,tspan,differential_vars=differential_vars)

sol = solve(prob, DABDF2())

ERROR: type Nothing has no field α
Stacktrace:
  [1] setproperty!(x::Nothing, f::Symbol, v::Float64)
    @ Base ./Base.jl:43
  [2] calc_W!
    @ ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/derivative_utils.jl:549 [inlined]
  [3] update_W!
    @ ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/derivative_utils.jl:653 [inlined]
  [4] nlsolve!(nlsolver::OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, integrator::OrdinaryDiffEq.ODEIntegrator{DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, true, Vector{Float64}, Vector{Float64}, Float64, SciMLBase.NullParameters, Float64, Float64, Float64, Float64, Vector{Vector{Float64}}, DAESolution{Float64, 2, Vector{Vector{Float64}}, Nothing, Nothing, Nothing, Vector{Float64}, DAEProblem{Vector{Float64}, Vector{Float64}, Tuple{Float64, Float64}, true, SciMLBase.NullParameters, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, Vector{Bool}}, DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, OrdinaryDiffEq.InterpolationData{DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Vector{Vector{Float64}}, Vector{Float64}, Vector{Vector{Vector{Float64}}}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}}, DiffEqBase.DEStats}, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}, OrdinaryDiffEq.DEOptions{Float64, Float64, Float64, Float64, PIController{Rational{Int64}}, typeof(DiffEqBase.ODE_DEFAULT_NORM), typeof(LinearAlgebra.opnorm), Nothing, CallbackSet{Tuple{}, Tuple{}}, typeof(DiffEqBase.ODE_DEFAULT_ISOUTOFDOMAIN), typeof(DiffEqBase.ODE_DEFAULT_PROG_MESSAGE), typeof(DiffEqBase.ODE_DEFAULT_UNSTABLE_CHECK), DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, Nothing, Nothing, Int64, Tuple{}, Tuple{}, Tuple{}}, Vector{Float64}, Float64, Nothing, OrdinaryDiffEq.DefaultInit}, cache::OrdinaryDiffEq.DImplicitEulerCache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}}, repeat_step::Bool)
    @ OrdinaryDiffEq ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/nlsolve/nlsolve.jl:21
  [5] perform_step!(integrator::OrdinaryDiffEq.ODEIntegrator{DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, true, Vector{Float64}, Vector{Float64}, Float64, SciMLBase.NullParameters, Float64, Float64, Float64, Float64, Vector{Vector{Float64}}, DAESolution{Float64, 2, Vector{Vector{Float64}}, Nothing, Nothing, Nothing, Vector{Float64}, DAEProblem{Vector{Float64}, Vector{Float64}, Tuple{Float64, Float64}, true, SciMLBase.NullParameters, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, Vector{Bool}}, DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, OrdinaryDiffEq.InterpolationData{DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Vector{Vector{Float64}}, Vector{Float64}, Vector{Vector{Vector{Float64}}}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}}, DiffEqBase.DEStats}, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}, OrdinaryDiffEq.DEOptions{Float64, Float64, Float64, Float64, PIController{Rational{Int64}}, typeof(DiffEqBase.ODE_DEFAULT_NORM), typeof(LinearAlgebra.opnorm), Nothing, CallbackSet{Tuple{}, Tuple{}}, typeof(DiffEqBase.ODE_DEFAULT_ISOUTOFDOMAIN), typeof(DiffEqBase.ODE_DEFAULT_PROG_MESSAGE), typeof(DiffEqBase.ODE_DEFAULT_UNSTABLE_CHECK), DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, Nothing, Nothing, Int64, Tuple{}, Tuple{}, Tuple{}}, Vector{Float64}, Float64, Nothing, OrdinaryDiffEq.DefaultInit}, cache::OrdinaryDiffEq.DImplicitEulerCache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}}, repeat_step::Bool)
    @ OrdinaryDiffEq ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/perform_step/dae_perform_step.jl:67
  [6] perform_step!(integrator::OrdinaryDiffEq.ODEIntegrator{DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, true, Vector{Float64}, Vector{Float64}, Float64, SciMLBase.NullParameters, Float64, Float64, Float64, Float64, Vector{Vector{Float64}}, DAESolution{Float64, 2, Vector{Vector{Float64}}, Nothing, Nothing, Nothing, Vector{Float64}, DAEProblem{Vector{Float64}, Vector{Float64}, Tuple{Float64, Float64}, true, SciMLBase.NullParameters, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, Vector{Bool}}, DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, OrdinaryDiffEq.InterpolationData{DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Vector{Vector{Float64}}, Vector{Float64}, Vector{Vector{Vector{Float64}}}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}}, DiffEqBase.DEStats}, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}, OrdinaryDiffEq.DEOptions{Float64, Float64, Float64, Float64, PIController{Rational{Int64}}, typeof(DiffEqBase.ODE_DEFAULT_NORM), typeof(LinearAlgebra.opnorm), Nothing, CallbackSet{Tuple{}, Tuple{}}, typeof(DiffEqBase.ODE_DEFAULT_ISOUTOFDOMAIN), typeof(DiffEqBase.ODE_DEFAULT_PROG_MESSAGE), typeof(DiffEqBase.ODE_DEFAULT_UNSTABLE_CHECK), DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, Nothing, Nothing, Int64, Tuple{}, Tuple{}, Tuple{}}, Vector{Float64}, Float64, Nothing, OrdinaryDiffEq.DefaultInit}, cache::OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}, repeat_step::Bool)
    @ OrdinaryDiffEq ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/perform_step/dae_perform_step.jl:179
  [7] perform_step!
    @ ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/perform_step/dae_perform_step.jl:171 [inlined]
  [8] solve!(integrator::OrdinaryDiffEq.ODEIntegrator{DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, true, Vector{Float64}, Vector{Float64}, Float64, SciMLBase.NullParameters, Float64, Float64, Float64, Float64, Vector{Vector{Float64}}, DAESolution{Float64, 2, Vector{Vector{Float64}}, Nothing, Nothing, Nothing, Vector{Float64}, DAEProblem{Vector{Float64}, Vector{Float64}, Tuple{Float64, Float64}, true, SciMLBase.NullParameters, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, Vector{Bool}}, DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}, OrdinaryDiffEq.InterpolationData{DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Vector{Vector{Float64}}, Vector{Float64}, Vector{Vector{Vector{Float64}}}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}}, DiffEqBase.DEStats}, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, OrdinaryDiffEq.DABDF2Cache{Vector{Float64}, Vector{Float64}, Vector{Float64}, OrdinaryDiffEq.NLSolver{NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, true, Vector{Float64}, Rational{Int64}, Nothing, Float64, OrdinaryDiffEq.NLNewtonCache{Vector{Float64}, Float64, Float64, Vector{Float64}, Matrix{Float64}, Matrix{Float64}, Nothing, Nothing, LinearSolve.LinearCache{Matrix{Float64}, Vector{Float64}, Vector{Float64}, SciMLBase.NullParameters, Nothing, LinearAlgebra.LU{Float64, Matrix{Float64}}, LinearSolve.InvPreconditioner{LinearAlgebra.Diagonal{Float64, Vector{Float64}}}, LinearAlgebra.Diagonal{Float64, Vector{Float64}}, Float64}}}, Float64}, OrdinaryDiffEq.DEOptions{Float64, Float64, Float64, Float64, PIController{Rational{Int64}}, typeof(DiffEqBase.ODE_DEFAULT_NORM), typeof(LinearAlgebra.opnorm), Nothing, CallbackSet{Tuple{}, Tuple{}}, typeof(DiffEqBase.ODE_DEFAULT_ISOUTOFDOMAIN), typeof(DiffEqBase.ODE_DEFAULT_PROG_MESSAGE), typeof(DiffEqBase.ODE_DEFAULT_UNSTABLE_CHECK), DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, DataStructures.BinaryHeap{Float64, DataStructures.FasterForward}, Nothing, Nothing, Int64, Tuple{}, Tuple{}, Tuple{}}, Vector{Float64}, Float64, Nothing, OrdinaryDiffEq.DefaultInit})
    @ OrdinaryDiffEq ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/solve.jl:478
  [9] #__solve#499
    @ ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/solve.jl:5 [inlined]
 [10] __solve
    @ ~/.julia/packages/OrdinaryDiffEq/Op0Oq/src/solve.jl:4 [inlined]
 [11] #solve_call#37
    @ ~/.julia/packages/DiffEqBase/1V2xg/src/solve.jl:61 [inlined]
 [12] solve_call(_prob::DAEProblem{Vector{Float64}, Vector{Float64}, Tuple{Float64, Float64}, true, SciMLBase.NullParameters, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, Vector{Bool}}, args::DABDF2{3, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing})
    @ DiffEqBase ~/.julia/packages/DiffEqBase/1V2xg/src/solve.jl:48
 [13] solve_up(prob::DAEProblem{Vector{Float64}, Vector{Float64}, Tuple{Float64, Float64}, true, SciMLBase.NullParameters, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, Vector{Bool}}, sensealg::Nothing, u0::Vector{Float64}, p::SciMLBase.NullParameters, args::DABDF2{0, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing}; kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ DiffEqBase ~/.julia/packages/DiffEqBase/1V2xg/src/solve.jl:87
 [14] solve_up
    @ ~/.julia/packages/DiffEqBase/1V2xg/src/solve.jl:78 [inlined]
 [15] #solve#38
    @ ~/.julia/packages/DiffEqBase/1V2xg/src/solve.jl:73 [inlined]
 [16] solve(prob::DAEProblem{Vector{Float64}, Vector{Float64}, Tuple{Float64, Float64}, true, SciMLBase.NullParameters, DAEFunction{true, typeof(f), Nothing, Nothing, typeof(jac), Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, Vector{Bool}}, args::DABDF2{0, true, Nothing, NLNewton{Rational{Int64}, Rational{Int64}, Rational{Int64}}, typeof(OrdinaryDiffEq.DEFAULT_PRECS), Val{:forward}, true, nothing})
    @ DiffEqBase ~/.julia/packages/DiffEqBase/1V2xg/src/solve.jl:68
 [17] top-level scope
    @ REPL[28]:1