How can I generate an Event if an indicator has changed it´s value?

I need do gather some Errormessages of an application (e.g. The application sends "Not Ready" and it´s indicated on the LabVIEW window) because I want to sample them in a History box.
I´ve tried this: First I placed an control (an LED) on the panel and copied the value of the "Not Read" indicator to a property node of the LED.
Then configured the Event structure with the setting "Value has changed" of the LED.
But the Event structure is not triggered only when I set the indicator with mouse..!
Thanx in advance for Help!

Sorry, can t read the message...
"Paul Cardinale" a écrit dans le message de
news: [email protected]..
> EMG wrote in message
news:<506500000008000000BF000100-1079395200000@exchange.ni.com>...
> > I need do gather some Errormessages of an application (e.g. The
> > application sends "Not Ready" and it s indicated on the LabVIEW
> > window) because I want to sample them in a History box.
> > I ve tried this: First I placed an control (an LED) on the panel and
> > copied the value of the "Not Read" indicator to a property node of the
> > LED.
> >
> > Then configured the Event structure with the setting "Value has
> > changed" of the LED.
> >
> > But the Event structure is not trig
gered only when I set the indicator
> > with mouse..!
> >
> > Thanx in advance for Help!
>
> Use the Val (signaling) property.

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