Updating already open subvi's front panel

[Dvorkind]

Hello,

I'm trying to create a user message which is updated while the time countdown not finished yet. Its front panel should remain opened till the user press 'Ready'.

Can I do that without reopen the front panel again and again in the for loop (while calling the subVI),  but only updating the already open subVI's front panel?

Can I somehow use a refnum to the subVI?

 Thank you

[aeastet]

Try these. I moved the open front panel property to the main vi and you close in in the sub vi.

[J-M]

Another possibility.

Jean-Marc

[Dvorkind]

Hello,

Thank you for your fast response.  It do it's work greatly. 

But I still has a problem with getting the "Ready" status out of the subVI: I tried directly and by reference, but I can't find the way to receive the status in my main program.

What is the correct way to do that?

Thank you a lot for your help.

Irena 

[Dvorkind]

just to make it clear: the program that worked is of aeastet.

The second (of J-M) one gave me an error about "Invalid Property node" of the 'caller'. I'm pretty new with LabVIEW, so this code is too complicated for me to try to debug it .... Thank you for your good intentions.

Irena 

[Mark_Yedinak]

The most flexible way is to use a queue or a notifier to pass the data. Global variables can be problematic.

[aeastet · Accepted solution]

SOmething like this should work.

[J-M]

Sorry:  Save the two VI in the same directory.  Open only CheckMessageV3.vi and run.

JM

[Dvorkind]

Thank you, aeastet. It works perfectly. Simply and great !  

J-M, thank you too, it works now, but when it counts down to zero, it ends without waiting to user's 'Ready'. Anyways,  I would be glad if you could explain me your code, so I can learn from it.

Thanks a lot to you both for your effort. 

[J-M]

I add comments.

Jean-Marc