How to use KNITRO on Ubuntu?

Specific Domains Optimization (Mathematical)
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1

I’m using JuMP and KNITRO on Ubuntu (Remote), the solver KNITRO has been installed successfully, and KNITRO.jl is installed as well, the env command KNITRODIR and LD_LIBRARY_PATH are set, building KNITRO is successful, but using JuMP, KNITRO KNITRO.has_knitro() gives me false, all the packages used are latest, I don’t know why, the following is the error msgs:
ERROR: could not load symbol "KN_new": /opt/julia/bin/julia: undefined symbol: KN_new Stacktrace: [1] KN_new @ ~/data/wjqiao/julia/juliaPkg/packages/KNITRO/tnAEC/src/libknitro.jl:29 [inlined] [2] KN_new() @ KNITRO ~/data/wjqiao/julia/juliaPkg/packages/KNITRO/tnAEC/src/C_wrapper.jl:10 [3] KNITRO.Optimizer(; license_manager::Nothing, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}) @ KNITRO ~/data/wjqiao/julia/juliaPkg/packages/KNITRO/tnAEC/src/MOI_wrapper.jl:146 [4] KNITRO.Optimizer() @ KNITRO ~/data/wjqiao/julia/juliaPkg/packages/KNITRO/tnAEC/src/MOI_wrapper.jl:139 [5] _instantiate_and_check(optimizer_constructor::Any) @ MathOptInterface ~/.julia/packages/MathOptInterface/1fRdT/src/instantiate.jl:94 [6] instantiate(optimizer_constructor::Any; with_bridge_type::Type{Float64}, with_cache_type::Nothing) @ MathOptInterface ~/.julia/packages/MathOptInterface/1fRdT/src/instantiate.jl:175 [7] set_optimizer(model::Model, optimizer_constructor::Any; add_bridges::Bool) @ JuMP ~/.julia/packages/JuMP/PKxEW/src/optimizer_interface.jl:493 [8] Model(optimizer_factory::Any; add_bridges::Bool) @ JuMP ~/.julia/packages/JuMP/PKxEW/src/JuMP.jl:200 [9] Model(optimizer_factory::Any) @ JuMP ~/.julia/packages/JuMP/PKxEW/src/JuMP.jl:192 [10] top-level scope @ ~/data/qwj/tstJuMP.jl:5

2

Can you share the output of

using Pkg
Pkg.status()

and the output of

versioninfo()

?

3

I had a similar problem. In the README.md of KNITRO.jl github:

  • If KNITRO.has_knitro() returns false but you are confident that your paths are correct, try running Pkg.build("KNITRO") and restarting Julia. In at least one user’s experience, installing and using KNITRO in a temporary Julia environment (activated with ] activate --temp) does not work and the need to manually build is likely the reason why.

It worked for me.

4

KNITRODIR should be set such that ${KNITRODIR}/lib/libknitro.so exists.

I’ve clarified this in a PR Clarify installation instructions in the README by odow · Pull Request #304 · jump-dev/KNITRO.jl · GitHub

5

I have the latest version KNITRO.jl and JuMP.jl, the problem is solved by @odow, thank you.

1 Like
6

Thank you, it works for me.

1 Like