> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cowboy.inc/llms.txt
> Use this file to discover all available pages before exploring further.

# E2002 — Volume operation rejected (E_VOLUME_PARAM_INVALID)

> Volume operation rejected (E_VOLUME_PARAM_INVALID)

# E2002 — Volume operation rejected (E\_VOLUME\_PARAM\_INVALID)

| Property | Value |
| - | - |
| **Code** | `2002` |
| **Slug** | `E2002` |
| **Category** | `storage` (Storage) |
| **CIP** | CIP-9 |

## What happened

Volume operation rejected (E\_VOLUME\_PARAM\_INVALID): \{detail}.

This is the receipt's `what` text, produced by the node's `ExecutionError::RasVolume`. Placeholders in braces are filled from the failing transaction.

## Why it happened

The node rejected the operation with `E2002` (category `storage`, Storage). The receipt's `why` field carries the specific cause and `context` carries structured details, such as the values that filled the placeholders above.

The normative rule is in CIP-9.

## How to fix

Check erasure k/m bounds, wrapped-DEK length, and the volume name rule (\[a-zA-Z0-9\_-.], max 64 bytes, not '.' or '..').

## Receipt example

```json theme={null}
{
  "code": 2002,
  "slug": "E2002",
  "category": "storage",
  "what": "volume operation rejected (E_VOLUME_PARAM_INVALID): {detail}",
  "fix": "Check erasure k/m bounds, wrapped-DEK length, and the volume name rule ([a-zA-Z0-9_\\-.], max 64 bytes, not '.' or '..').",
  "docs_url": "https://docs.cowboy.inc/errors/E2002"
}
```

***

> [card] [All Error Codes](https://docs.cowboy.inc/errors/overview.md)
>
> View the complete error code reference


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