One more confirmation, my setup is one PC running 24/7, with 2 TWS windows at all time, client(s) connecting via socket either to live (API trading) or paper (for code development and testing).? This has been working well for years and started failing this morning, you get one of two errors ("competing live session" or "same IP").
I also did the following, to no avail
- stopped the live TWS, connecting to the paper account works fine, bars and tickers stream as expected
- then starting the live TWS, that kills the existing tickers and bars immediately
