Thanks Miyako, at the end i have found that was my fault.
Unfortunately when you develop something alone… sometime you do the same error multiple times .
However the command Set File to PasteBoard… do what i need.
I’m building in my company something like a Document management system because it easy to manage filenames and folder structure in the DB.
I found that is not a problem to send and sync file using documento to blob from server to client and the other way around. Is also really efficient in remote mode ( from outside with VPN)
so i have create a collection listbox with the file i want to show.
The file naturally are on the server.
when double click or drag the file a copy is automatically download and open through “launch External process”)
unfortunately this function use the default application as default.
so i allow to drag the file on another application .
I This part i had problems but now anymore.
next step will be to integrate your 4d-plugin-apple-file-promisess and windows plugin.