> ## 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

* [Document](/vantage/documentation/skill-designer/process/condition-activity/document)
* [Object model](/vantage/documentation/skill-designer/process/condition-activity/object-model)