---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/variables/E_ISOLATION_ENCODER_REQUIRED.md
description: >-
  Thrown when the codec must escalate a value past the `'raw'` tier (an exotic
  leaf: function, Error, or registered custom-encodable) but the optional
  `@nhtio/encoder` peer is not installed. Printf arg: the offending argument
  path. Non-fatal: a caller can catch this and pass the value through their own
  BYO codec instead.
---

# Variable: E\_ISOLATION\_ENCODER\_REQUIRED

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

Defined in: [src/batteries/isolation/exceptions.ts:30](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/isolation/exceptions.ts#L30)

Thrown when the codec must escalate a value past the `'raw'` tier (an exotic leaf: function, Error,
or registered custom-encodable) but the optional `@nhtio/encoder` peer is not installed. Printf arg:
the offending argument path. Non-fatal: a caller can catch this and pass the value through their own
BYO codec instead.