@gavi40 said in Chiltern Mainline Class 68 MK3 Coaches Missing!: I spent hours trying to figure out why one scenario wasn't working properly, there was no mention on their site that some may not work as you need extra downloads from 3rd party websites. The scenarios that use other content are all removed from the Steam version. If you download the software from Just Trains and don't have the other software the scenario won't work, so that isn't the reason you had a problem. I think if you'd reinstalled the Steam version it may well have sorted it, but there you go.