Hi Pascal.Sorry
Ok after looking tutorials and doc I understand that Worksession Reference “Set Active Model”, in Rhino means “Open” the 3dm file.
But is not intuitive because pre concept using other softwares.
The learning process is fast. But I’m afraid other users can delete or lose data in the process of learning.
IDEA SOLUTIONS
I wish interface change name from “Set Active Model” to “Open File…”
Or
The first time the user push this button , a windows pops up warning that “Rhino will open the file name …”. And a toggle to not show this warning window anymore.