PS The developer log file has this at the bottom of a lot more stuff:
? <kuid:447264:1005> Loading asset <kuid:447264:1005>
- <kuid:447264:1005> TADGetSpecFromAsset> Unknown asset <kuid:447264:1005>
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
? <NULL> MeshResource::LoadResource> <kuid2:1942:39108:2> | arc:fld:$(packages)/sc379f/content||kuid2 1942 39108 2.tzarc|
? <NULL> Loading mesh school_1942.im
! <NULL> VE166: 18 combined chunks (of 18 source) in .im file:
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> TNISpeedTreeApp::UpdateState> Billboard batch starvation (1302) 523:19723350/
; <NULL> TNISpeedTreeApp::UpdateState> Billboard batch starvation (1611) 523:19723350/
; <NULL> TNISpeedTreeApp::UpdateState> Billboard batch starvation (1626) 523:19723062/
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0026 'consist_1', message Train.GetJunctionTrackPermit, Timeout
; <NULL> GSRouter:

one(), 4 outstanding node(s)
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.GetJunctionTrackPermit, Timeout
; <NULL> 1 queued router messages cleared for 0025 'consist_0', message Train.ThreadAITrainStuck, Tick
which seems to be where things stick.
Lataxe