My goal is to include the OPC COM ProxyStub MergeModule (x64) in my msi. I am using WiX. I tried following the example code for How To: Install the Visual C++ Redistributable with your installer. Here is my Product.wxs: <?xml version="1.0" encoding="utf-8"?> <Wix xmlns="http://schemas.microsoft.com/wix/2006/wi" ...> <Product Id="*" Name="..." Language="1033" Version="..." [...] read more