Because version 8.6 is a legacy product, the installation process differs from modern "NI Package Manager" methods.
Sometimes, fighting with a legacy runtime is not worth the effort. Consider these alternatives: labview runtime engine version 8.6
LabVIEW Run-Time Engine (RTE) 8.6 is a legacy but pivotal component in the National Instruments (NI) ecosystem. Released around 2008, it is specifically required to run executables and shared libraries built with LabVIEW 8.6. National Instruments Key Technical Specifications System Requirements Because version 8