# UNKNOWN_EXPORT_MESSAGE

**Kind:** Function

**Source:** [`packages/core/errors/messages.ts`](https://github.com/nestjs/nest/blob/master/packages/core/errors/messages.ts#L227)

**Part of:** [Core](subsystem-packages-core)

## Signature

```ts
function UNKNOWN_EXPORT_MESSAGE(token: string | symbol, module: string)
```

## Parameters

| Name | Type |
|---|---|
| `token` | `string | symbol` |
| `module` | `string` |