I'm just asking how, in a VI somebody gived me, it is possible to write the Caption.Text property node of boolean controls in a cluster (it's a bit complicated, but real). I tried to do the same in a VI of mine, but all I have is the Error 1320.
In the Caption.Text help, it's said that it's impossible to change a Caption.Text in a running VI.
I attach the 2 screenshots to illustarte what I'm saying
You can get rid of the 1320 error by making the caption visible once. I'm not sure if the caption is considered an owned label, but if it says you can't change it in a running VI, and you didn't manage to, then you can't. Instead, have a string indicator inside your cluster and wire the value you want to display into it.
You can change a captions text while the VI is running. That's one of the differences between it and the Label. The Caption is not technically an Owned Label, even though it's owned by the control. If you right click on the 'Caption.Text' property and select "Help for Text", you'll see where it's all explained.
As TST mentioned, you must first make it visible by manually turning it on (right click>Visable Items>Caption). This problem only shows up in LabVIEW 7.1. All previous versions will let use a property node without first manually turning it on.