# EVENT_DEFINITION_NOT_FOUND

- Surface: API
- HTTP status: 404

## Cause

No Event Definition in this App matched the requested Metric Event name or Event Definition reference.

## Fix

Author the Event Definition in this App, or use the name of an Event Definition that already belongs to this App, then retry.

## Related

- [EVENT_DEFINITION_UNPUBLISHED](https://splitch.dev/docs/error/EVENT_DEFINITION_UNPUBLISHED)
- [EVENT_DEFINITION_VERSION_NOT_FOUND](https://splitch.dev/docs/error/EVENT_DEFINITION_VERSION_NOT_FOUND)
- [APP_MISMATCH](https://splitch.dev/docs/error/APP_MISMATCH)

Source: https://splitch.dev/docs/error/EVENT_DEFINITION_NOT_FOUND