Why is the Value Property Node of a Typedef control not typedef itself?

This is not preventing me from progressing, but I am puzzled by what I am seeing on one of my diagrams (LV 2011).
I have a typedef control which I am reading around my diagram and passing to some subVI. For this purpose I create a read "Value" Property Node and pass the value to the subVI.
The subVI uses the same typedef control as that in my calling VI but nonetheless there is a coersion dot on my calling VI's diagram when I connect the "Value" to the subVI connector. Why?
The closest to this discussion I found was this old one, but it did not end up with a final answer.... It turns out that the typedef control I am talking about is an enum, but that does not matter.
As a matter of fact, if you connect the Value output of a Property Node to a sequence and create a subVI from that sequence, the corresponding control has lost any link with the typedef. In other words, the Value property node of a typedef control is not a typedef. Why?

[...] Why?
Because you haven't posted an idea here.
Well.. maybe you or somebody else has and I missed it, after all there's more than 14k ideas so for just for LabVIEW.. What? Who said that means there's a lot of room for improvement in LabVIEW??
Jokes appart, if there is an idea, please give the link.
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"

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Hi everybody,
I am using labview 6.1 and developing an application which call a reentrant SubVI. However when I use the Value Property Node (which I need : the use of local terminal isn't possible in my final application) in the re-entrant SubVI, i get the initial value of the control, not the current value !?
Is there anybody to explain me why and how to solve this problem ?
I have attached 3 VIs for a better explanation.
Thanks.
Attachments:
Master.vi ‏9 KB
Slave.vi ‏23 KB
globales.vi ‏7 KB

You just need to create a local variable instead of a property node to read the value of the control that was passed in. Popup on the control and select Create >> Local Variable. Or just wire the control to where you need it. Data flow is still working; Feroz just explained an idosyncracy of how property nodes work in reentrant VIs.
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I'm not sure how many people would know what the message means, but they would be forewarned and hopefully check into it further (e.g. test with this specifically in mind).
I filed a bug report to have this investigated further and at least documented better.
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Problem with the Value property node (MacOS)

As far as I have tested it, Value Property nodes (and Value (signaling)) don't work in MacOS : The value property appears as a boolean, the value(signaling) as a cluster (width, height).
Even with boolean controls, the node is not working.
No such problem in LV 8.6.
Am-I missing something ? Is that some "intended use" ? Or simply a bug ?
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Solved!
Go to Solution.

That sounds like some sort of indexing problem with the property nodes like somesort of corrupted installation. What if you just delete the property node and recreate it?
I dropped a numeric control and looked at the shortcut menu for the list of property nodes. Right below Value and Value (signalling) are Visible (which would be a boolean) and Xcontrol, which when you step down through the submenus, the first choice is Container bounds, a cluster of Width and Height. So these 2 datatypes that are 2 lower on the list match the ones you are getting.
What happens if you pick another property node a few elements up or down on the shortcut menu? Does is happen for some other properties, and if so, are thereany properties that are okay?
Here is what my property nodes look like for a numeric and I draggged the box up and down to show the natural order of the property nodes. Note that I have scripting installed, so there are a few more property nodes (and the blue box at the top) that you might not have.
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Attachments:
Example_VI_BD.png ‏4 KB

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I am using a 2D array to store operator inputs on my front panel. I only want to display one element to the operator at a time. I am trying to use the Index Values property node to change the displayed element. However, I can only get the Rows index to work. How do I direct the Columns index as well? The help says to use one per dimension. I need clarification on what this is talking about. I've tried adding a second element to the property node, 2 seperate property nodes, and diferent wiring techniques. (series, parallel)

If you only wire up one of the inputs (col or row) what you get out is a 1D array of either the column or row. If you wire controls to both, then you will get one element out of the array. Getting a single element in a 2D array requires you to specify both a row and column.
Message Edited by Dennis Knutson on 02-08-2007 08:34 AM
Attachments:
Index 2D Array.PNG ‏2 KB

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Hi!
In Labview 8.0 I want to send data to a front panel chart via its value property node. This works just fine if I wire a single waveform to the value property (attachment1). However, if I wire it with a waveform array (attachment2) it fails. Is there any workaround?
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Attachments:
attachment1.PNG ‏3 KB
attachment2.PNG ‏3 KB

The reason I was showing this with only one graph was that
the
two-graph version failed for me. I had tried having separate data
sources, of course. Just to be sure I have rebuilt the VI from scratch
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Message Edited by frumpel on 04-05-2007 10:53 AM
Attachments:
test1.vi ‏16 KB
block-diagram.PNG ‏33 KB
error-message.PNG ‏15 KB

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You set the active cell with a property node. Once you select an active cell, you can do specific things to that cell and that cell alone, things like set the background color.
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Why is the Value Property Node of a Typedef control not typedef itself?

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