Add limits to step settings via TestStand API from LabVIEW

Dear LabVIEW and TestStand Community!
I'm trying to add FileGlobal Variables as limits to TestStand step NumericLimit programmatically, via LabVIEW, via TS API. I attach screenshot of the code, which I use (part of it - the module, which only sets values to low and high limit of the step), and also I attach, what I manage to get.
In TS, when I open sequence file, after running of the code, I can see in the description line of the test, that it accepted limits, which I set from LV - you can see it from the screenshot, it is marked with yellow. But in the Tab "Limits", there are still default numeric values, not FileGlobal Variables.
Could anyone explain, what doest it mean, and how to set up them correctly?
Thanks a lot in advance!
Solved!
Go to Solution.
Attachments:
Limits.PNG ‏33 KB
Add Limits.PNG ‏15 KB

It's kind of sequence generator what I'm doing now...
Thank you very much for fast reply, but when I setup "UsexxxExpr" to true, it doesn't change the situation... Could you, please, check my attachment? Maybe, some mistake in syntax?
Attachments:
Add Limits.PNG ‏23 KB

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Add limits to step settings via TestStand API from LabVIEW

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