This one was really a pain for me in X1 so I'm very relieved to find it back to working as before (prior to X1)...
 
Now I can copy the song file while it is still open in Sonar. I usually do this many times during any given session to continuously backup my work as I go...
 
In X1 I had to shut down Sonar/copy/re-open Sonar..... annoying all session long...
 
Many thanks for this "fix" as with many others....
 
Good Cooking Bakers!
 
Keni