Please leave bug reports either on Juno.jl GitHub repository or at Julia's discussion forum under the
Tooling ▶ Juno category.
Packages > Juno > Settings and change
Julia Path to point to the Julia binary.
It is possible that your Antivirus Software prevents certain files to be downloaded or executed that are necessary for Juno to function. Consider disabling antivirus software's real time monitoring for the duration of the installation. For certain scanners (Avast and McAffee) it might also be necessary to exclude
from the real time monitoring after installation. This is an upstream issue which should hopefully be resolved soon.
Check whether you have a little red bug symbol in the status bar (lower right):
If so, click on it and then click on
Restart Atom and you should be good to go!
There's a chance the update of julia-client failed. To get a clean re-install while preserving any setting you might have changed, try the following steps:
- Close all Atom instances.
- Start a terminal (e.g.
cmdon Windows or the Terminal App on MacOS)
apm uninstall julia-client.
apm install julia-client.
- Start Juno. Everything should work again.
Fallback Renderer option in the
Terminal Options in julia-client's settings and restart Atom for good measure.
This problem manifests itself in errors like:
WARNING: Method definition WARNING: Module Juno with uuid 738353145462472 is missing from the cache. ERROR: LoadError: Declaring precompile(false) is not allowed in files that are being precompiled. ERROR: LoadError: Failed to precompile Atom to C:\Users...
One way this can occur is from updating Julia versions. However, this has a very easy fix. Go into the Julia REPL (not the Juno console in Atom, but the actual Julia terminal window) and type in the command:
That will force Julia to re-compile all of the cache files and should fix the problem.
Juno is under rapid development, so it's expected that previous versions may not be compatible with the Atom packages overtime. Julia will automatically use older versions on the Julia-side packages, but Atom will always give you the most up-to-date packages it knows about, which causes this issue. The easy way to solve this is to always use the current Julia release. Otherwise, resort to the Developer Installation Instructions for the Atom packages and use git to checkout an older version. This requires some git know-how, so it's only recommended if the older version of Julia is truly necessary.
If you want to use Juno with the nightly version use caution: this package is under rapid development so do so at your own risk. That being said, the Julia nightly should work using the Developer Installation Instructions. Note that this will require you to be on master for the Julia and Atom packages, so things will be changing likely before documentation changes.
Much like Julia has its
~/.julia/config/startup.jl file for executing code on startup, Juno will execute code contained in
~/.julia/config/juno_startup.jl after Julia has been booted and a connection with the editor is established. This allows running code on startup that queries the frontend, e.g.