Right-click the installer -> -> Compatibility .
Released by National Instruments (now Emerson Test & Measurement) in the early 2000s, LabVIEW 6.1 represents a pivotal moment in the history of graphical programming. While modern versions of LabVIEW have pushed into 64-bit architectures and cloud connectivity, the 6.1 Run-Time Engine remains a subject of relevance for maintenance engineers and legacy system integrators. labview runtime engine 6.1