Errors using JuMP with Ipopt or HiGHS: UndefVarError: libipopt not defined and UndefVarError: libhighs not defined

[odow]

Hi @Aakriti_Rohatgi, please start a new post, and provide the output of versioninfo() and import Pkg; Pkg.status().

If I have to guess, you probably have a large number of packages in the global environment. Try following the example here to create a new environment:

Installing Pardiso on Julia (Mac)

You have somehow installed a very old version of Ipopt that is not actually using Ipopt_jll. Do you have lots of other packages in your environment? You should use a new environment for each project. Don’t install a bunch of packages into the default environment; bad things can happen like this that lead to version conflicts. You can work with projects like this: (base) oscar@Oscars-MBP /tmp % julia _ _ _ _(_)_ | Documentation: https://docs.juliala…