Additional Information
In the VI Properties, you can also enter or review notes on your particular version under
Revision History.
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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.

If other methods are unsuccessful, open the VI in the earliest version on your computer. If an error occurs, the VI is saved in a later version. Close the VI and repeat this process for the next version of LabVIEW. The first version that opens a VI without any error is the version in which the VI is compiled.