I installed Cajon Pass 4 and the 4.1 update. Tried to run the default eastbound activity to check out the route. Just before my train gets to the switch leaving Hobart Yard, the train breaks a coupler. Tried running with several different consists and break coupler at about the same place. Don't know if there is a problem with the route or the activity, so was wondering if anyone else has had the same or similar problem. Checked the route with Routriter and turned up no problems. This is the freeware route found here at trainsim.com by Patrick Wise and the update by Charlie Sabaja.