Which version of labview?

[SallyA]

How can I tell which version of labview was used to create a vi and application?

Is there a VI viewer.

[TiTou]

Hi Sally,
No VI viewer as far as I know... To know the version of LV used... hummm... ... Do you have any idea if it's close to LV2 or LV8 ?
There might be some tricks but I would try open with LV5, then LV6 and so on starting from the oldest version you have.
When you know the first digit (e.g. LV7) I have no idea of how to find out if ti was LV7.0 or 7.1 or 7.1.1....

I often have to switch form a version to another when I maintain old apps so I always put that kind of info in the "documentation" of my VI... 😉

[smercurio_fc]

You mean without trying to open the VI with LabVIEW? 'Cause that will tell you. For example, if you try to open a VI written in 8.0 with 7.1 it will tell you that the VI is written in 8.0.

I don't know about a build application, but for a VI this information is saved with the VI. Unfortunately, you need to know the structure of the file format to find the exact location for this information. I looked at a few VIs written in 7.1 and 8.0 and this location varied from file to file, no doubt due to some of the data structures being of variable length. I don't know if NI would be willing to share this information.