Oscar Dowson

You need ```Julia julia> using JuMP, Dualization, Gurobi julia> model = Model() A JuMP Model ├ solver: none ├ objective_sense: FEASIBILITY_SENSE ├ num_variables: 0 ├ num_constraints: 0 └ Names registered...

> I'm using Dualization.jl because I need to repeatedly resolve the dual of a large model while modifying the objective Why not modify the right-hand side? If you are solving...

Perhaps post on https://discourse.julialang.org/c/domain/opt/13 with a reproducible example of the problem you are trying to solve and we can point you in the right direction.

> CBC solver gives an objective value of -289.26906 for both files. Gurobi concurs with `-289.269406`

This happens when you're using libblastrampoline without providing a default BLAS. This fix is: https://github.com/jump-dev/Ipopt.jl/blob/4c156461ef1fda3c9f015520197afda4e8ca3e26/src/Ipopt.jl#L14-L19 But it would be useful to know which dependency is causing it.

Then this issue should probably be closed in favor of https://github.com/kalmarek/SymbolicWedderburn.jl/issues/87

I've just seen this issue again. The issue is because @kocvara has only ``` Libraries: └ [ LP64] libopenblasp-r0.3.27.dylib ``` and some code is probably looking for an ILP blas....

I can't reproduce this, even on an M1 machine. @kocvara how did you install Julia? If it's not reproducible, I'm tempted to close this issue.

I don't have much advice here. It was hard to get things working without knowing the internal details. So perhaps I've papered over other mistakes that are now showing themselves.

> It might just be easier to have the user manually call GRBupdatemodel(model) in these cases As a comment, ideally we should not have to do this. The goal of...