> For the complete documentation index, see [llms.txt](https://docs.opshub.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.opshub.com/v7.221/help-center-index/troubleshooting-index/errors-index/rally-error-solutions/oh-rallydev-0056.md).

# OH-RallyDev-0056

### Description

When the user encounters an error **OH-RallyDev-0056**, then the following error message will appear:

OH-RallyDev-0056: Changes field does not have data in required format. This field requires an advanced mapping. Verify whether a desired advanced mapping is configured for this field or not. Refer to the product guide for the connector Rally for details.

### Cause

* Changes field does not have required advanced mapping.

### Solution

* Refer to [Map Changes field for Change Set](/v7.221/connectors/rally.md#map-changes-field-for-change-set)


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