When you build an application in LabVIEW 6.1, you cannot simply copy the .exe file to a computer that lacks LabVIEW. That computer needs the to interpret the code.
If you see an error like:
Need expert help migrating off LabVIEW 6.1? Contact a certified NI Alliance Partner. Do not attempt to "force" this runtime onto a modern OS without virtualization. labview runtime engine 61 exclusive
Executables built in older versions like 6.1 cannot run in newer versions of the RTE (e.g., LabVIEW 2016 or later). You must use the exact version used for the build. When you build an application in LabVIEW 6