Are you able to go to that point in surveyor?
Can you please go through the process that you normally go through, and crash Trainz again. Immediately after it crashes and you have closed Trainz down, go to the Trainz install folder and open a file called 'JetLog.txt'. Please copy and paste the contents of this into a forum post.
However, when you do so, please put this before it: (code)
And this after it (/code).
Replace the ( and ) with [ and ] respectively.
This will actually put it into a separate window with a scroll bar, effectively shortening your post whilst containing all of the information.