> 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/aur3175.md).

# AUR3175

## Error Message

`AUR3175: %s does not appear to be a component or CustomElement recognizable by Aurelia; make sure to use the @customElement decorator for your class if not using conventions.`

## Description

This error occurs when a lazy import resolves to something that the router cannot treat as a component/custom element (for example, the module does not export a custom element, or the class is missing `@customElement` and conventions are not enabled).

## Solutions

* Ensure the imported module exports a custom element view-model (or definition) that Aurelia can recognize.
* Add `@customElement(...)` if you are not relying on conventions.

## Troubleshooting

* Inspect what the import resolves to (the `%s` value) and confirm it’s the expected component.
* Ensure you’re importing the correct module/export.


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