`compute_conflict` and `computeIIS` not defined in Gurobi

[abcdvvvv]

Hello @odow !

I hope you are doing well.

Minimal reproducible example

using JuMP, Gurobi
Gurobi.computeIIS
Gurobi.compute_conflict

I want to call these two functions to see why the model is not feasible, but Julia throws an error:

ERROR: UndefVarError: `computeIIS` not defined in `Gurobi`
ERROR: UndefVarError: `compute_conflict` not defined in `Gurobi`

Do you know what's going on here?
I would be very grateful if you could provide any clues.

Environment

> versioninfo()
Julia Version 1.12.1
Commit ba1e628ee4 (2025-10-17 13:02 UTC)
Build Info:
  Official https://julialang.org release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)

[odow]

compute_conflict is part of JuMP. See https://jump.dev/JuMP.jl/stable/manual/solutions/#Conflicts

computeIIS doesn't exist. GRBcomputeIIS does, but that is part of the low-level C API; you almost certainly don't mean to call it.

If you have more questions, please post on our community forum: https://discourse.julialang.org/c/domain/opt/13

[odow]

Here's an example:

using JuMP, Gurobi
model = Model(Gurobi.Optimizer)
@variable(model, x[1:10] >= 0)
@constraint(model, [i in 1:10], x[i] <= 1)
@constraint(model, x[2] + x[3] >= 3)
optimize!(model)
compute_conflict!(model)
iis, _ = copy_conflict(model)
print(iis)

julia> print(iis)
Feasibility
Subject to
 x[2] + x[3] ≥ 3
 x[2] ≤ 1
 x[3] ≤ 1