I have recently downloaded the latest version of OpenBVE. Saving it into it's own Folder while keeping the older version intact just in case something went wrong with the downloading.
I have not used the new version's Railway folder which means when running the new version I need to redirect to the older Railway Folder to find the Route, Objects and Sound folders. Some of the trains have loaded successfully in the latest version but I got this same error message with some. I was wondering if it's because of the redirection. However, with Gavin reporting the same problem, which I would think he would have all the files in the new Railways folder.
I realise it is close to Christmas and I will also be away from home for three days from later this evening so won't be able to check any replies until I return as I won't have access to a computer, so will have to leave this until I return. Hopefully someone will have the answer by then.