I was thinking that.. but then Railclone doesn't update unless you agree to it, as far as I know and not only that, if it's an incompatible object, maybe it's not the object you are trying to use, could the scene you have, contain a railclone object, that isn't compatible, that you are unaware of.. What I mean is, is this a fresh scene, only you have worked on, or did you download a scene, which you then stated working on
For my money though, despite you saying you would if you could afford it... I would highly recommend upgrading
Anyway, hopefully the experts here will solve this for you, though they may ask you to upload your scene, so they can check it out.