550nm wrote:Not sure whether I should be surprised, but this LabVIEW logic seems to be functioning correctly on a 64bit OS.
It's compiled on Windows 7 32bit and [seems to be] running correctly on Windows 7 64bit...
Yes - because even though the operating system is 64-bits, your compiled application is running in a 32-bit environment. See Running 32-bit Applications. The challenge comes when you install a 64-bit version of LabVIEW and then try to run your VI within that 64-bit environment.