Likewise, all this talk about old passenger enabled platforms not working had me worried so I quickly put together a test route in Trainz22 with a sample of my old platforms and sent an old consist to each one in turn. Happily, it stopped at each platform and the people got on and off normally. I used Navigate TO and Load to control the action. So it must be something different in the code of the nonworking platforms. Wasn't there once a warning about using undocumented features even if they enabled you to do something interesting, it may not last.