---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/media/variables/E_MEDIA_STEP_UNAVAILABLE.md
description: >-
  Thrown by the step runtime when a plan step has no registered implementation.
  Distinct from `E_MEDIA_ENGINE_REQUIRED`: this indicates the battery itself
  does not (yet) implement the verb, not that the consumer omitted an engine.
---

# Variable: E\_MEDIA\_STEP\_UNAVAILABLE

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

Defined in: [src/batteries/media/exceptions.ts:153](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/media/exceptions.ts#L153)

Thrown by the step runtime when a plan step has no registered implementation. Distinct from
`E_MEDIA_ENGINE_REQUIRED`: this indicates the battery itself does not (yet) implement the
verb, not that the consumer omitted an engine.