I am still getting the below error after todays update.  I deleted the config and cs file for a fresh install.

05/06 19:19:51 | Error while compiling: MyTransit.cs(277,56): error CS1061: Type `CompleteTrain' does not contain a definition for `trackSpeed' and no extension method `trackSpeed' of type `CompleteTrain' could be found. Are you missing an assembly reference?

Your server is not updated.

Thanks I will do another update and see if that fixes it.