---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/variables/E_ISOLATION_UNSUPPORTED_ENV.md
description: >-
  Thrown when `serveIsolated()` cannot duck-detect a supported guest environment
  — neither `globalThis.self.postMessage` (Web Worker) nor
  `globalThis.process?.send` (node child_process) is present. Fatal: there is no
  meaningful guest to serve.
---

# Variable: E\_ISOLATION\_UNSUPPORTED\_ENV

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

Defined in: [src/batteries/isolation/exceptions.ts:16](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/isolation/exceptions.ts#L16)

Thrown when `serveIsolated()` cannot duck-detect a supported guest environment — neither
`globalThis.self.postMessage` (Web Worker) nor `globalThis.process?.send` (node child\_process) is
present. Fatal: there is no meaningful guest to serve.