# X_ERROR_CODE_UNREGISTERED

## Means

the error reference documents a code no package registers

## Typical cause

a row written for a code that was renamed, never built, or emitted as a `Finding` without a `registerErrorCodes()` call

## Fix

register it in the owning package's `src/errors.ts`, or move its row under [Reserved codes](/error-codes#reserved-codes)

[CLI and verify](/error-codes#cli-and-verify)