---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/sandbox/variables/E_SANDBOX_NARROWING_UNSUPPORTED.md
description: A requested policy narrowing cannot be represented by the backend.
---

# Variable: E\_SANDBOX\_NARROWING\_UNSUPPORTED

```ts
const E_SANDBOX_NARROWING_UNSUPPORTED: CreatedException<[string]>;
```

Defined in: [src/batteries/sandbox/exceptions.ts:43](https://github.com/NHTIO/ADK/blob/v1.20260824.1/src/src/batteries/sandbox/exceptions.ts#L43)

A requested policy narrowing cannot be represented by the backend.