I couldn’t get the second one to work either.
The parameter list in the GDL editor is not connected to anything in the UI script, it is only affected by the parameter script.
You can’t get the property GUIDs in the parameter script, that’s why the UI_CUSTOM_POPUP_LISTITEM and UI_CUSTOM_POPUP_INFIELD were created.
Péter Baksa
Library Platform, Software Engineer
GRAPHISOFT SE