1. Important: How to Use this Guide

This Migration Guide describes how to upgrade to RTI Connext Micro 4.2.0 from release 3.0.3 or later.

Attention

See the upgrade considerations in this guide for each applicable release. For example, if you are upgrading from 3.0.3 to 4.2.0, see both sections Upgrading from 3.0.3 to 4.1.0 and Upgrading from 4.1.0 to 4.2.0. Together, these sections provide important upgrade considerations that apply when upgrading from your current to your new release.

Whether you will keep some of your legacy Connext Micro systems or migrate entirely to a new Connext Micro release, read this guide to see what settings or other changes you may need to make before you upgrade all or part of your system. The full set of changes for your release is described in the Release Notes section for your release:

• What’s New in 4.2.0

• What’s New in 4.1.0

• What’s New in 3.0.3

This guide describes only those changes that may break old behavior.