You don't believe me? Check this thread at
http://forums.auran.com/trainz/showthread.php?t=82636.
Shane
EDIT: Perhaps it's something that's been fixed in TS12. In TS2009 SP4 and possibly TS10, it's an issue.
I tried very hard to NOT give the impression that i was 'disbelieving'.
I build routes now exclusively in TS10 SP4, exactly the same version. I NEVER load anything in Surveyor but the session layer. I NEVER work on anything except the session layer. Never. Ever. Every week or so when I remember I merge the session layer into the route layer. I then immediately save and reload the session layer.
The issue you link to in the other thread is not something I 'disbelieve'. There was an issue and it was fixed. But if the
sole issue in that thread was track on the session layer then my routes simply would not be possible. You cannot lay the issue in that thread at the feet of the session layer. It simply isn't so. Something else was at fault.
The issue could have been the specific track, the specific trackside assets, a save glitch, a content database glitch, a zillion other things which i suspect have not been eliminated by testing.
The ONLY reason I can think of that the trackside assets would not 'take' is that the track was on one layer and the attempt was made to place the trackside assets with another layer active. That is NOT the same as 'issues with the track on the session layer'. The result would have been identical if the track was on the route layer and the trackside objects were attempted in the session layer. Either way it is user error, nothing to do with layers.
There would be very few people spend more time actively route building in Surveyor in TS10 than I, and I emphatically state that the best, safest way to build routes in that product is to load and work on only the session layer. Early on I used the route layer and participated in the 'layers suck' debates very much against them on account of the number of route-building and save issues i was having. There is a long thread somewhere that put me on to the 'Session Layer' thing - it is utterly totally (so far!) bombproof...
Andy