Additional Information
If you have
multiple LabVIEW versions installed in the same computer, when you open a project or VI without manually selecting the LabVIEW program, LabVIEW will automatically launch in the version that was last used.
You may encounter a separate but related issue when trying to open a VI from an older version of LabVIEW in a newer version of LabVIEW. If LabVIEW is unable to open a VI saved in a much older version of LabVIEW, you will receive
error 1126 (0x466): VI version is too early to convert to the current LabVIEW version. In this case, you may need to save the VI to an intermediate version (between LabVIEW versions 6.0 and 8.5) before upgrading it to a newer version.