When trying to spawn an ICE 4 on Nuremberg - Ingolstadt, I am met with this error. Other, shorter trains work fine, and judging by the text content, I believe it does seriously restrict usage of trains that are too long for a route. ...really? What for? Is there a bypass, or a fix? Is this intended?
Well nevermind, it was caused by a specific asset in a new mod I was developing. Sorry for the confusion!