Can we install an older version of Oceananigans?

[weigwu]

Hi,

I've running a 3D eddy model GPU run for a while using Oceananigans. The experiment runs perfectly but recently I accidentally uninstall all my Julia packages. When I re-install the latest version Oceananigans and re-run my experiments, I got error messages when executing initial time step. A quick questions I want to ask before I re-debug everything is: is there a way to specify the version of Oceananigans to install in Julia? Any comments would be very vey helpful.

Thanks,
Roger

(P.S. I also attached the error message I got

)

[glwagner]

Yes, to install, for example, 0.79.0, you would type ] to enter package manager mode, and then

pkg> add Oceananigans@0.79.0

You can use an environment using a Project.toml to avoid having to manually specify packages whenever you start using a new system.

I also suggest using github to store your code (which you may already do), along with the Project.toml. That will mean you could lose your whole computer but still regenerate your code, because the Project.toml can encode the "compatability" of your code with all the packages it uses.

Here's some documentation about that I recommend reading:

https://docs.julialang.org/en/v1/stdlib/Pkg/

https://pkgdocs.julialang.org/v1/environments/

[glwagner]

If you paste your whole code it might be easy to upgrade. I would need to see the entire error message to debug that... but reading the code might be easier depending on its complexity.

[weigwu]

Thanks a lot for these suggestions. I download version 0.76.0 that I used before. It works now. I will go ahead to setup Project.toml and store my codes. Thanks again for your help!