I've personally never had any problem's with Norm's Bris-south maps for 04 if I can rightly justify. You might want to check your "log0" file which can be found within the drive you have installed the sim on, whether it's C:\Program Files\Auran\TRS2004\Cache\Logs This may or may not identify the problem concerning Bris-south, but is worth to check and see what is missing or needs to be updated.
Other than that, the only reason I could see fit for your stack dump issue to have occured would be to simply go into Surveyor for this map and go into "Wireframe mode" and check if there is any object hidden beneath ground level that shouldn't in any case be there.
You could also erase any or all loco's/rollingstock from the map and then save, if all else fails as above.
A pic of your stack dump problem would also be of great help.