Error building `Gurobi`

Specific Domains Optimization (Mathematical)
,
3

The above problem has been solved according to your suggestion. But when I run the code, a new error has occurred.

using JuMP,JuMPeR,Gurobi

# Define problem parameters
I = 3           # Number of factories
T = 24          # Number of time periods
d_nom = 1000*[1 + 0.5*sin(π*(t-1)/12)  for t in 1:T]  # Nominal demand
θ = 0.20        # Uncertainty level
α = [1.0, 1.5, 2.0]  # Production costs
c = [α[i] * (1 + 0.5*sin(π*(t-1)/12))  for i in 1:I, t in 1:T]
P = 567         # Maximimum production per period
Q = 13600       # Maximumum production over all
Vmin = 500      # Minimum inventory at warehouse
Vmax = 2000     # Maximum inventory at warehouse
v1 = Vmin       # Initial inventory (not provided in paper)

# Setup robust model
invmgmt = RobustModel(solver=GurobiSolver(OutputFlag=0))

# Uncertain parameter: demand at each time stage lies in a interval
@uncertain(invmgmt, d_nom[t]*(1-θ) <= d[t=1:T] <= d_nom[t]*(1+θ))

# Decision: how much to produce at each factory at each time
# As this decision can be updated as demand is realized, we will use adaptive
# policy - in particular, an affine policy where production at time t is an
# affine function of the demand realized previously.
@adaptive(invmgmt, p[i=1:I,t=1:T], policy=Affine, depends_on=d[1:t-1])

# Objective: minimize total cost of production
@variable(invmgmt, F)  # Overall cost
@objective(invmgmt, Min, F)
@constraint(invmgmt, F >= sum{c[i,t] * p[i,t], i=1:I, t=1:T})

# Constraint: cannot exceed production limits
for i in 1:I, t in 1:T
    @constraint(invmgmt, p[i,t] >= 0)
    @constraint(invmgmt, p[i,t] <= P)
end
for i in 1:I
    @constraint(invmgmt, sum{p[i,t], t=1:T} <= Q)
end

# Constraint: cannot exceed inventory limits
for t in 1:T
    @constraint(invmgmt,
        v1 + sum{p[i,s], i=1:I, s=1:t} - sum{d[s],s=1:t} >= Vmin)
    @constraint(invmgmt,
        v1 + sum{p[i,s], i=1:I, s=1:t} - sum{d[s],s=1:t} <= Vmax)
end

# Solve
status = solve(invmgmt)

println(getobjectivevalue(invmgmt))
  • ERROR
    LoadError: The C API of Gurobi.jl has been rewritten to expose the complete C API, and
    all old functions have been removed. For more information, see the Discourse
    announcement: https://discourse.julialang.org/t/ann-upcoming-breaking-changes-to-cplex-jl-and-gurobi-jl
    Here is a brief summary of the changes.
  • Constants have changed. For example CB_MIPNODE is now GRB_CB_MIPNODE
    to match the C API.
  • Function names have changed. For example free_env(env) is now
    GRBfreeenv(env).
  • For users of Gurobi.Optimizer(), model.inner is now a pointer to the C
    model, instead of a Gurobi.Model object. However, conversion means that
    you should always pass model instead of model.inner to the low-level
    functions. For example:
    model = direct_model(Gurobi.Optimizer())
grb_model = backend(model)  # grb_model is Gurobi.Optimizer
# Old
Gurobi.tune_model(grb_model.inner)
# New
GRBtunemodel(grb_model)
  • Some functions have been removed entirely. For example:
    using JuMP, Gurobi
model = direct_model(Gurobi.Optimizer())
optimize!(model)
grb_model = backend(model)
stat = Gurobi.get_status_code(grb_model.inner)
    is now:
    using JuMP, Gurobi
model = direct_model(Gurobi.Optimizer())
optimize!(model)
valueP = Ref{Cint}()
grb_model = backend(model)
ret = GRBgetintattr(grb_model, "Status", valueP)
if ret != 0
    # Do something because the call failed
end
stat = valueP[]

The new API is more verbose, but the names and function arguments are now
identical to the C API, documentation for which is available at:

To revert to the old API, use:
import Pkg
Pkg.add(Pkg.PackageSpec(name = “Gurobi”, version = v"0.8.1"))
Then restart Julia for the change to take effect.
in expression starting at untitled-254185b6f7c55e2fdb6293d5d74fc246:17
error(::String) at error.jl:33
GurobiSolver(; kwargs::Base.Iterators.Pairs{Symbol,Int64,Tuple{Symbol},NamedTuple{(:OutputFlag,),Tuple{Int64}}}) at deprecated_functions.jl:548
(::Gurobi.var"#GurobiSolver##kw")(::NamedTuple{(:OutputFlag,),Tuple{Int64}}, ::typeof(GurobiSolver)) at deprecated_functions.jl:548
top-level scope at untitled-254185b6f7c55e2fdb6293d5d74fc246:17
include_string(::Function, ::Module, ::String, ::String) at loading.jl:1088