# Troubleshooting

> Messages you might see when starting Renart or running a pipeline, what they mean, and how to fix them.

Each entry starts with the message as Renart shows it.

## Renart projects must live inside a Git repository

```text
Error: renart projects must live inside a git repository: no git repository found
```

Renart works inside a Git repository and refuses to start elsewhere. Create one in the project folder, then start Renart again:

```bash
git init
renart
```

## Address already in use

```text
Error: failed to listen on 127.0.0.1:9000: listen tcp 127.0.0.1:9000: bind: address already in use
```

Another program is using the port you passed with `--port`. Choose a different port, or leave `--port` out: on the default port, Renart moves to the next free port by itself and says so:

```text
warning: 127.0.0.1:8080 is unavailable, using fallback port 8081 instead
```

## This environment is protected

**Materialize** is disabled with _This environment is protected: interactive execution is disabled_. The selected environment has the **Protected** guardrail, which blocks runs you start yourself. Switch to another environment in the top bar, or deploy the pipeline and let a schedule run it. See [Execution guardrails](https://getrenart.com/docs/connections-environments/managing-connections.md#execution-guardrails).

## Review run is blocked by a template

**Review run** lists a problem for an asset, such as:

```text
Failed to render template: invalid Jinja syntax: expected name or integer (Line: 8 Col: 14, near "}}")
```

A Jinja expression in that asset is incomplete, for example `{{ var. }}`. Choose **View source** to open the asset at that line, fix the expression, and check the result in the **Render** tab. See [Variables and Jinja in SQL](https://getrenart.com/docs/editing-assets/variables-and-jinja.md).

## An asset stays stale after it was built

If you built a single asset while its upstreams were out of date, it still reads the outdated upstream tables. Rebuild with **Review run**, which opens on the out-of-date assets, or choose **Build upstreams first** when Renart asks. See [Rebuild only what changed](https://getrenart.com/docs/workspace/rebuild-what-changed.md).

## Related

- [Installation](https://getrenart.com/docs/installation.md)
- [Alpha status](https://getrenart.com/docs/alpha-status.md): known limitations of the public alpha.
- [Discord](https://discord.gg/jTH758KNP8): ask the community about problems not listed here.