---
title: "PLSS Release 4.3"
slug: "plss-release-43"
updated: 2026-10-27T23:12:24Z
published: 2026-10-27T23:12:24Z
canonical: "ims-handbook.cenosco.com/plss-release-43"
---

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

# PLSS Release 4.3

June 2025

Release 4.3

Note: These Release Notes only cover specific PLSS enhancements. All other enhancements, not related to specific disciplines, are described in the [IMS Platform (General)](/v414/docs/ims-platform-general-release-43) Release Notes.

---

## ILI Calc Service Converted from Octave to R

ILI calculations have now been implemented in R as part of the ongoing modernization of the MTIA Calculation Service. This upgrade replaces the previous Octave-based engine, delivering enhanced processing speed, improved security, and greater reliability. The modernization ensures full result parity with the legacy system.