# X_NEW_ERROR_CODE_INVALID

## Means

`bun run new-error-code` was called without what it needs, or for a package with no `errors.ts`

## Typical cause

a code, `--package`, `--title`, `--cause` and `--fix` are all required, because the registration needs the title and the wiki row needs the cause and the fix — and a `--cause` that repeats `--title` is refused. Or `packages/<pkg>/src/errors.ts` does not exist

## Fix

`bun run scripts/new-error-code.ts X_PKG_WHAT_FAILED --package <pkg> --title '<one line>' --cause '<what usually makes it happen>' --fix '<command or edit>'`. For an unknown package, `bun run workspaces:list` lists the directories

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