---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/media/variables/E_MEDIA_ENGINE_REQUIRED.md
description: >-
  Thrown at plan validation when a verb (or the specific input it is applied to)
  requires an engine that is not configured on this pipeline. The message states
  which engine slot is missing and — when the failure is input-specific — that
  the verb should not be retried on this media in this deployment.
---

# Variable: E\_MEDIA\_ENGINE\_REQUIRED

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

Defined in: [src/batteries/media/exceptions.ts:115](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/media/exceptions.ts#L115)

Thrown at plan validation when a verb (or the specific input it is applied to) requires an
engine that is not configured on this pipeline. The message states which engine slot is
missing and — when the failure is input-specific — that the verb should not be retried on
this media in this deployment.