Question about JuMP

there is something wrong with my JuMP!

It used to work!why? :persevere:
thank you!

Looks like some package version conflict with CapacityExpansion, JuMP, and/or BiLevelJuMP. At least when I install CapcityExpansion it downgrades the preinstalled JuMP to version 0.19.2.
You could try to remove these packages and re-install them. You may also try to add these packages in an empty project-environment, and see what happens.

1 Like

thanks!it works! :grinning:

Here’s the issue:

@abcde If you need CapacityExpansion.jl with JuMP 0.21, it’s probably not too much work to help them update. Probably mostly just a few find-and-replaces.