# 68. Troubleshooting¶

This troubleshooting page is to help ensure you software environment is setup correctly to run this lecture set locally on your machine.

Using VS Code, you can easily revert back individual lectures, all of the lectures, or get updated versions of the lecture notes.

See the lecture on setting up your environment for more.

If the Project.toml or Manifest.toml files are modified, then you may want to redo the instantiation step to ensure you have the correct versions.

## 68.2. Fixing Your Local Environment¶

If packages are misbehaving, you may want to simply reset the lectures or at least the Project.toml and Manifest.toml files from the lecture notes, and then redo the instantiation step This will fix nearly every problem.

However, if you are still having issues you could delete the entire .julia directory for your users, and then redo the installation of packages as well as ] add IJulia. It is fast for recent versions of Julia.

The directory is located in your user directory (e.g. ~/.julia on MacOS and Linux, and C:\Users\YOURUSERNAME\.julia on Windows) or you can find this directory by running DEPOT_PATH[1] in a Julia REPL.

You should be able to upgrade Julia by simply

• Installing the latest release from the Julia website.

• Uninstalling your old release (so that the VS Code extension only uses the newest version)

• And, finally, you will need to redo the ] add IJulia installation step to ensure that Jupyter knows how to find the new version.

Warning

While upgrading Julia will typically work with the notebooks, there may be upgrades where a particular lecture has problems. Make sure that you have updated your notebooks in case bug fixes were made, and post an issue to the GitHub source for these lectures.

## 68.4. Reporting an Issue¶

One way to give feedback is to raise an issue through our issue tracker.

Please be as specific as possible. Tell us where the problem is and as much detail about your local set up as you can provide.

Another feedback option is to use our discourse forum.

Finally, you can provide direct feedback to contact@quantecon.org