# AUR3169

## Error Message

`AUR3169: The provided IAppRoot does not (yet) have a controller. A possible cause is calling this API manually before Aurelia.start() is called`

## Description

This error occurs when router APIs that rely on the root controller are invoked before the app has started (before `Aurelia.start()` creates/attaches the root controller).

## Solutions

* Delay router usage until after `Aurelia.start()` resolves.
* In app startup, avoid calling router navigation APIs before the app is started.

## Troubleshooting

* If you call router APIs during bootstrap, ensure they run after `await aurelia.start()`.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.aurelia.io/developer-guides/error-messages/router/aur3169.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.