Creating a Parameter returns null but indicates correct execution

In the attached definition it appears two new parameters are created, except there not. Any idea what I might be missing?
unnamed.gh (10.1 KB)

Checked your definition and the Value picker that’s going into your add parameter “S” Scope input is not correct… Disconnect it and right click on the “S” and select expose picker … you should see a Parameter Scope list with three values “Instance / Type / Global” OR you can just pick a value directly when you right click on the “S”.

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Thanks Mohamed. This was it. The help documentation is a bit confusing on this particular example and I didn’t realize they were using an exposed picker instead of a user generated picker.
Thanks for this tip!