Introduction In the world of industrial automation, legacy software support is not just a convenience—it is a necessity. Many engineers and developers working with Rockwell Automation software (such as RSLogix 5000, Studio 5000, and RSLinx Classic) have encountered a cryptic but crucial component: RVAddonMSI . When paired with Microsoft Visual Studio 2015 , this add-on becomes essential for integrating custom add-ins, developing automation logic, or maintaining older compatibility layers.