I just bought the upgrade to Toast Titanium 18 Pro and I'm very frustrated because it doesn't work on Mac OS 10.15.1 Catalina as advertised. With previous versions of Toast I had no problems. I also wrote and called support by phone and they promised me an answer that I'm still waiting for. The warning "I can't complete the last command because of an error an item with that name already exists - Code Result = -48" appears.
I also want to emphasize that I made many attempts and that I also tried to give the files unusual and absurd names never used. before, but the result was always the same "an item with that name already exists"