> For the complete documentation index, see [llms.txt](https://docs.aurelia.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aurelia.io/developer-guides/error-messages/router/aur3173.md).

# AUR3173

## Error Message

`AUR3173: Invalid route config. When the component property is a lazy import, the path must be specified.`

## Description

This error occurs when a route configuration uses a lazy import for `component`, but does not specify a `path`. The router cannot infer a route path from a lazy import alone.

## Solution

* Specify `path` explicitly for routes that use lazy imports.

## Troubleshooting

* Check route configuration objects for `component: () => import(...)` and ensure they also include `path`.


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