I’m doing a scenario planner with various UK sets being AI controlled. I’m in a 45 pulling 8 coaches, but just before I reach Slough I’m getting a message saying service failure - derailment. At first I thought my approach was too fast, but then thought HST’s pass through there at 125 and judging I was stopping at the station and way below the loco and coaches top speed then surely not. I restarted and done it again but approached much slower and I got the same message again. I don’t know if this is actually a technical issue or I’ve missed something. Thanks