How to programmatically add UDVs to project?

Hi all,
I have successfully used something like this to programatically add shared variables to an LVLIB (the code assumes that the library associated with the Container Reference contains at least one variable):
An example output would be:
Container Name: "MyLibrary.lvlib"
Variable Name: "Variable1"
Variable Path: <blank>
Variable Type String: "Variable"
(I notice that there is no way to specify the data type of the variable, and LabVIEW creates a DBL variable in the LVLIB by default.)
However, if Container Reference is associated with a "User-Defined Variables" container, then I get Error 1 at the Invoke Node ("LabVIEW: An input parameter is invalid"). A example output is:
Container Name: "User-Defined Variables"
Variable Name: "Variable1"
Variable Path: <blank>
Variable Type String: "Variable"
Questions:
Does the error occur because LabVIEW is trying to create a DBL variable (which is not allowed with UDVs)?
How can I programmatically add UDVs to my project?
Thanks in advance!

What is the scope of your project? How will you be using these UDV's?
Mark P.
Applications Engineer
National Instruments
www.ni.com/support

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