I found something today that can help you to answer others users. My problem is not only with PL/SQLDeveloper like I Thougth. That happends in others application, the point is de Copy is working but with TEXT ONLY. I detect that because in EXCEL I couldnt copy a formula, buy it copy the value...
I had the same problem, and I am NOT using remote desktop. My copy command is not working from de sql window, comand window, explaint plant window etc.. It just work from de result of a SQL (sql window), but just in the result table. Also I can do a copy command from other program and do a paste...
I wonder know what I need to view all triggers and package bodies. Without grant DBA. I already grant SELECT ANY DICTIONARY, SELECT ANY TABLE and SELECT_CATALOG_ROLE