I created a simple list which populates all circles created in a part body:
`PartBody`.Query("Circle", "")
This will keep adding any new circles also that I create later in the design.

Now I want to get the diameter of a circle, say 2nd circle in the list and assign it to a length parameter.
To do so, I did this: Created a length parameter, Length.1 and assigned it a formula:
Length.1 = length(`List.1` ->GetItem(2))

But the value keeps coming as 0mm. What seems wrong here?
Kindly help.