LabVIEW
acquisition
Why I can't get a signal from the camera on my laptop within the vision acquisition function?
That's not LabVIEW nor LabVIEW NXG related...
Anyway, the error is "unknown" and there's very little for anyone (but you) to go on.
Something's wrong. It could be anything from "it's not on" to access rights or driver problems.
Search LabVIEW like a graph! 