Error - Can't load route

[eric]

On one of my routes in progress, I'm getting a fatal error resulting in a modal dialog box when I have the Dispatcher Window option selected..

Version    = X.1330
Build      = 0.0.4697.10612 Sat 11/10/2012  05:54 AM

Got one of these for every static consist:

Error: System.NullReferenceException: Object reference not set to an instance of an object.
   at ORTS.SignalObject.NextNode(Int32& node, Int32& direction, Int32& prevnode)
   at ORTS.Signals.NextNode(TrackNode[] trackNodes, Int32& node, Int32& direction, Int32& prevNode)
   at ORTS.Signals.Find_Next_Object(SignalObject startObj, Int32 nodestartindex, Int32 startDirection, Boolean in_direction_of_travel, Traveller tdbtraveller, Boolean min_distance_check, Single maxdistance, TrItem[] Tritems, TrackNode[] trackNodes, SIGFN[] fn_type)
   at ORTS.Signals.getNextObject(Traveller tdbtraveller, ObjectItemType req_type, Boolean forward, Single maxdistance, ObjectItemFindState& return_state)
   at ORTS.Train.InitializeSignals(Boolean existingSpeedLimits)
   at ORTS.Simulator.InitializeStaticConsists()
   at ORTS.Simulator.InitializeTrains()
   at ORTS.Simulator.Start()
   at ORTS.Program.<>c__DisplayClass8.<Start>b__7()
   at ORTS.Program.Start(UserSettings settings, String[] args)
   at ORTS.Program.Main(String[] args)

This is the final block in the logfile, and it's also the contents of the dispatch viewer:

 ENV SIGCFG TTYPE

Error: System.NullReferenceException: Object reference not set to an instance of an object.
   at ORTS.Debugging.DispatchViewer.InitData()
   at ORTS.Debugging.DispatchViewer..ctor(Simulator simulator, Viewer3D viewer)
   at ORTS.Program.<>c__DisplayClass8.<Start>b__7()
   at ORTS.Program.Start(UserSettings settings, String[] args)
   at ORTS.Program.Main(String[] args)

When I turn off the Option for the dispatch view, the route loads.

Any thoughts? This is a recent thing -- I was able to run the DV last Friday night, but made some significant updates to the route in the past couple days, so no idea what would be driving this...

[eric]

I think I might have a possible suspect issue here --- there's an island of track still in development which is not in the current TDB build, but does exist within the W files for those tiles.

Are the dispatcher view layout's dimensions being determined by what's in the W files, what is in the TDB, or a combination of both?...