getconstant not defined

[angeris]

Heya COSMO team!

Here's a (hopefully rather simple) bug:

using JuMP, COSMO

m = Model(COSMO.Optimizer)
@variable(m, x >= 0)

optimize!(m)

which gives

ERROR: LoadError: UndefVarError: getconstant not defined

Essentially, it seems that the function getconstant is not implemented and problem construction fails when including inequality constraints in the variable definition.

Thank you so much!
Guille

[migarstka]

Thanks for opening the issue.

1. I believe you forgot to specify the objective in the example above:

using JuMP, COSMO

m = Model(COSMO.Optimizer)
@variable(m, x >= 0)
@objective(m, Min, x)
optimize!(m)

2. Even if I don't specify the objective, I can't reproduce the error. What versions of JuMP, COSMO and Julia are you using?

[angeris]

I believe you forgot to specify the objective in the example above:

In my case, it fails independent of specifying an objective (and didn't include it in the MWE) because of it!

Even if I don't specify the objective, I can't reproduce the error. What versions of JuMP, COSMO and Julia are you using?

Here are the current version details (apologies, totally forgot to include them in the OP):

• Julia v1.4.2
• COSMO v0.4.1
• JuMP v0.21.3

Weirdly, the same problem construction also fails even when I add non-negativity as a separate constraint. This must have been some recent interface change from JuMP or MOI or something.

Thanks for the quick response! (For context, I'm attempting to use COSMO to solve some very large SDPs for some types of physical problems.)

[migarstka]

No worries. Happy to help. Are you sure it's COSMO v0.4.1? That version is 1.5 years old and will likely be incompatible with JuMP v0.21.3

[angeris]

Huh, that would explain it! Yes, this is what I have on pkg> status. This is odd as I just did a fresh Julia install and installed COSMO from the package manager. Updating now, will report on results...! Thanks again!

[angeris]

Works beautifully now! I did get some interesting warnings while installing, which I'm not quite sure about:

[ Info: Precompiling COSMO [1e616198-aa4e-51ec-90a2-23f7fbd31d8d]
┌ Warning: Pkg.installed() is deprecated
└ @ Pkg /Applications/Julia-1.4.app/Contents/Resources/julia/share/julia/stdlib/v1.4/Pkg/src/Pkg.jl:531
┌ Warning: Package COSMO does not have Pardiso in its dependencies:
│ - If you have COSMO checked out for development and have
│   added Pardiso as a dependency but haven't updated your primary
│   environment's manifest file, try `Pkg.resolve()`.
│ - Otherwise you may need to report an issue with COSMO
└ Loading Pardiso into COSMO from project dependency, future warnings for COSMO are suppressed.
┌ Warning: Pkg.installed() is deprecated
└ @ Pkg /Applications/Julia-1.4.app/Contents/Resources/julia/share/julia/stdlib/v1.4/Pkg/src/Pkg.jl:531

but this may be to purposefully not require users to install Pardiso as a dependency (from what I can see in the repo). Not exactly sure about the rest.

This may be better as a separate issue, though, so thank you!

[migarstka]

Exactly, we don't want to force users to install Pardiso. Will have to have a closer look why those warnings show up.

[angeris]

Sounds great, thanks!