Why is the "Called" property returns a name with *: Instance: 0?

I'm building a VI that returns a list of all the side screws and their auxiliary screws, etc., a given top-level VI.  I first open a reference giving the path to the top-level VI, and then use the property 'Called' to get the subVIs. I then (in a loop) get all each Subvi conscripts by opening a reference using the name of the previous output called string. I noticed something when I ask for conscripts by the string name of XYZ.vi, that I get all its subvis, but I also have a XYZ.vi:Instance:0 name returned. What is the purpose of the proceeding: 0 and why is it happening? I like understand why Instance: x would never get added to the name, and also why VI would return his name in the property called? The VI is not defined as re-enterent or calling themselves dynamically or anything like that.

Hope someone can explain that.

Thank you

James

Hi ejb068,

Hello and I hope that your well today.

I continued to study your issue now I am back in the office, with my LabVIEW machine and resources OR. I concluded and also since found a confirmation of this issue.

For a first level VI which has a few express screws on its block diagram, the names of the callee property currently includes a single instance of the upper level for each express VI VI.
For example, if a VI has two ExpressVIs in the block diagram. The property called node will return two instances of the toplevel VI.

First level VI = mainVI.vi

Express VI = delay

Result name called: mainVI:Instance0 (number lists according to the order screw Express are deleted from the diagram.)

: first level VI name: InstanceX

The problem is if you use VI server that this name is not valid - and causes a VI Server error. So I think it would be pretty safe filter these names.

Please let me know what you think,

Tags: NI Software

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