# ROUTER_CANNOT_MATCH

The `ROUTER_CANNOT_MATCH` error occurs when the router is unable to match the requested route to any of the known patterns. This could happen due to a misconfiguration in the routing setup or an erroneous request path.

## Troubleshoot

To troubleshoot this error, follow these steps:

1. **Review routing configuration:** Check the [routing configuration](/docs/redirects#configuration-redirects) to ensure that it is correctly set up to handle the requested route
2. **Verify request path:** Ensure that the request path is correct and adheres to the expected patterns defined in the routing configuration
3. **Check for typos:** Look for any typos or misconfigurations in the routing setup that might be causing the mismatch
4. **Review application logs:** Inspect the [application logs](/docs/deployments/logs) for any warnings or errors related to routing


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title: "ROUTER_EXTERNAL_TARGET_CONNECTION_ERROR"
description: "Connection error occurred while routing to an external target. This is a routing error."
last_updated: "2026-02-03T02:58:42.197Z"
source: "https://vercel.com/docs/errors/ROUTER_EXTERNAL_TARGET_CONNECTION_ERROR"
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