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

# RuleError

> The RuleError object — a single Document skill validation rule error in a Condition activity script.

`RuleError` describes a single Document skill validation rule error returned by [`Document.RuleErrors`](/vantage/documentation/skill-designer/process/condition-activity/document) in a Condition activity.

## Properties

| Name                | Type   | Access    | Description                                                                                                         |
| :------------------ | :----- | :-------- | :------------------------------------------------------------------------------------------------------------------ |
| **CurrentFieldId**  | string | Read-only | The document field identifier of the field that caused the rule error.                                              |
| **CustomMessage**   | string | Read-only | An error message from a custom skill. Returns an empty string for built-in rules, or when no custom message is set. |
| **ErrorParameters** | object | Read-only | The error parameters. Returned only for built-in rules.                                                             |
| **ErrorType**       | string | Read-only | The error type. Returned only for built-in rules.                                                                   |
| **RuleId**          | string | Read-only | The identifier of the rule that generated the error.                                                                |

## Related topics

<CardGroup cols={2}>
  <Card title="Document" icon="file-lines" href="/vantage/documentation/skill-designer/process/condition-activity/document">
    The document being processed by the Condition activity.
  </Card>

  <Card title="Object model" icon="diagram-project" href="/vantage/documentation/skill-designer/process/condition-activity/object-model">
    Full JavaScript object reference for Condition activity scripts.
  </Card>
</CardGroup>