> 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/aur3352.md).

# AUR3352

## Error Message

`AUR3352: Unexpected state at %s of %s`

## Description

This error indicates the viewport agent reached an unexpected internal state. In most cases, this should be treated as a router bug unless you are calling low-level viewport agent APIs directly.

## Troubleshooting

* Capture the two `%s` values and include them in a bug report.
* If you have custom viewport agent usage, ensure calls are made through supported router APIs.


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