Using property nodes with DVR to class

[CoastalMaineBird]

LV2013, Win7

I'm in the middle of changing a certain shift register data type from X.lvclass,  to Data Value Reference (DVR) of X.lvclass.

Where I create the class, I simply put the NEW DATA VALUE REFERENCE function  and into the shift register.

That breaks a few things - I had to change a few method calls to include the IN-PLACE ELEMENT (IPE) structure with a use-DVR function on the sides.  I expected that and it's good.

Then I got to this part and am confused.  This shows the code BEFORE I changed anything.

I have verified that the wire is NOT going behind the node, it is indeed connected as it appears.

Why is the wire to the property node not broken?

I was expecting that to be broken, and I would have to include an IPE here. But apparently not.

Does the property node automatically handle the IPE part ?  

If I wire in the equivalent VI, it breaks, because I can't connect a reference to a class input.

But why does the prop node not do that?  

I can find no help which declares this behavior.

[CoastalMaineBird]

It appears to be real, I finished repairs and it all compiles OK.

A new property node works OK, even with TWO properties.

I wonder if it dereferences the thing once, or twice, in this case:

[tyk007 · Accepted solution]

Class Property nodes can handle DVR instances; I believe this was on the feature list for an older version of LV (don't remember which). But I do recall it being a deliberate and intentional feature.

[pauldavey]

Darren posted about it here:

http://forums.ni.com/t5/LabVIEW/Darren-s-Occasional-Nugget-07-11-2013/m-p/2488908

[tyk007]

Also I'm fairly sure that in later versions the de-referencing only happens once; there used to be some quirks in this circa 2012; I admittedly have stayed away from the nodes for this purpose since.