If your application communicates with hardware (serial ports, GPIB, data acquisition cards), the runtime engine alone is not enough. You must also install the matching legacy versions of NI-VISA or NI-DAQmx drivers.
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The Runtime Engine handles user interface actions and core code execution, but it does not contain hardware drivers. If your compiled application interacts with DAQmx cards, GPIB instruments, or serial ports, you must install the corresponding hardware drivers separately. Ensure the driver versions deployed are compatible with LabVIEW 8.6. Missing Side-by-Side Configuration This link or copies made by others cannot be deleted
(Note: Compatibility may require running the installer in compatibility mode or applying specific NI service packs). Try again later
: Multiple versions of the LabVIEW RTE can be installed on the same computer simultaneously without conflict, provided they have different major version numbers (e.g., you can have 8.6 and 2012 installed at once). National Instruments Core Functions LabVIEW 8.6 Runtime and MAX installation - NI Community 21 Feb 2009 —