1. The easiest way to determine the LabVIEW version in which the VI was developed is to navigate to
File >> VI Properties>> General category. The Source version (the version the VI was originally written in) is in the bottom left of the tab as seen below.
2. If you would like to get the LabVIEW version in which the VI was developed, use the Application Invoke node which described in the following document
Get VI:Version Method.
3. If you attempt to open a VI that was saved in a newer version of LabVIEW, an error message will pop up, displaying the version of LabVIEW the VI was saved in.
Additional Information
In the VI Properties, you can also enter or review notes on your particular version under Revision History.
Prior to LabVIEW 7.0, you can programmatically examine portions of the VI code to determine its version. The attached example SortByVIVersion(OLD).llb contains a demonstration of this technique. This technique is no longer supported and will result in errors in new versions of LabVIEW.