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Troubleshooting

This page lists possible errors you may encounter and provides tips on how to fix them. If you have any questions about how to use this code, feel free to discuss with us.

If you have additional tips, please either report an issue or submit a pull request with suggestions.

Cannot find the Julia executable

Ensure that Julia is installed in your environment. Please download the latest stable version for your platform, and it's recommended to do it indirectly with Juliaup as explained on that page.

If you prefer not to install Juliaup, download the corresponding binaries instead. Next, create a symbolic link to the Julia executable. If the path is not included in your $PATH environment variable, add it by exporting the path to $PATH.

Some clusters, like Comet, or Expanse, already have Julia installed as a module, you can just module load julia to use it. If not, you should either install it yourself or contact your system administrator.

See Installation Guide for more information.

Julia starts slow

First, we recommend downloading the latest version of Julia using Juliaup. Usually, the latest version has the best performance.

For simple, one-time tasks in Julia, you can start the Julia REPL with

julia --compile=min

to minimize compilation or

julia --optimize=0

to minimize optimizations. Or you could make a system image and run with

julia --sysimage custom-image.so

See Fredrik Ekre's talk for details.