The first step in resolving this error is to make sure that the NI Variable Engine is started. To do so, open Windows Run from the Windows Start menu and enter services.msc. This should bring up a list of services on your computer. Scroll down so that NI Variable Engine is displayed, as in the screenshot below:
The highlighted box in the above figure will read Started if the Variable Engine is running. If it is not running, click on the button to the left of the service to start it up. Note:
If you do not see NI Variable Engine in the list of services, then the service is not installed on your computer. This can occur if you ran a custom LabVIEW installer on your computer that did not include the NI Variable Engine as an additional installer. If this is the case, make sure that NI Variable Engine is included as an additional installer
in the installer build specifications, rebuild the installer, and run it on your computer.
If you do not own the installer or cannot rebuild it, you can download the appropriate version of the LabVIEW Run-Time Engine
installer from the National Instruments website. When you run the LabVIEW Run-Time Engine installer, ensure you have selected the NI Variable Engine for installation.