TestStand Object Reference strange behavior with LabVIEW Module

[python007]

Hi to all

I have a strange behavior with a LabVIEW Module which I use in a Subsequnce and use an Object Reference for Value passing.

I have created an exmaple to demonstrate the behavior.

I have the "MainSequence" in which I call three times the Subsequence "GetRandomNumber":

As Paramter I use an ObjectRefrence:

In the "GetRandomNumber" Subsequence I call a LabVIEW Module and assign its Output (a Variant) to the ObjectReference:

The strange behavior is that I get three times the same RandomNumber in the ObjectReference. It seems something strange with the ObjectReference.

I have alos added a direct call of the LabVIEW Module and assign its Output to the ObjectReference:

With the direct call of the LabVIWE Module I get three Times a different Value in the ObjectReference

What I'm doing wrong?

[Oli_Wachno]

Disclaimer: I haven't looked at the code you have attached

Just for the sake of completeness, there is a random function in TS also, so unless you need something very fancy here 😉

What you are describing sounds odd! Do you get the expected (three different) results, if you set the ObjectReference to Nothing  in between the sequence calls? 

[python007]

Hey Oli, thanks for your reply

I just use the Random function to ilustrate my Problem.

I already tried to set ObjectReference to Nothing in between the sequence calls but without a effect.

Does somebody has an Idea what I'm doing wrong?

Best regards

[Oli_Wachno]

OK, I took a look at your code and I can confirm the behaviour as described.

The Parameter of the SubSequence is updated within the SubSequence, confirmed using single-stepping and checking the variables pane.

Nevertheless, the Local (in the caller) assigned to the SubSequence-Parameter is only updated for the very first call.

Since I haven't seen this issue with other data types than variants, my gut feeling is, that this has to do something with the variant itself.

It smells like a bug to me.... I'd recommend contacting NI Support! They should be able to work with the information you have collected