> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.itential.com/itential-platform/2023-2/release-notes/breaking-changes/transformations-using-thisarg-feature/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.itential.com/_mcp/server.

# Transformations using thisArg feature

> Breaking change notice that transformations using the thisArg feature are incorrectly migrated in Platform versions 2023.2.0 through 2023.2.14, requiring an upgrade to 2023.2.15 or higher.

## Breaking change notice (2023.2.0 – 2023.2.14)

This breaking change affects Itential Platform versions 2023.2.0 through 2023.2.14. Transformations that use the `thisArg` feature are incorrectly migrated during an upgrade if they contain any of the following:

* Assignment from a `thisArg` incoming schema to the array parameter of a higher-order method.
* A `thisArg` incoming schema with a sub-schema.
* Assignment from the root `thisArg` incoming schema.

## What should I do?

If you have any transformations with a `thisArg` incoming schema that contain any of the attributes listed above, upgrade to Itential Platform **2023.2.15 or higher**.

Contact the [Product Support Team](https://itential.atlassian.net/servicedesk/customer/portals) if you need additional help or require further information.

> Breaking change notice that transformations using the thisArg feature are incorrectly migrated in Platform versions 2023.2.0 through 2023.2.14, requiring an upgrade to 2023.2.15 or higher.