system.invalidoperation crash

[jim]

rror: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
   at System.Collections.Generic.List`1.Enumerator.MoveNext()
   at Orts.Simulation.RollingStocks.MSTSWagon.SignalEvent(Event evt) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\RollingStocks\MSTSWagon.cs:line 2104
   at Orts.Simulation.RollingStocks.SubSystems.Brakes.MSTS.AirSinglePipe.Update(Single elapsedClockSeconds) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\RollingStocks\SubSystems\Brakes\MSTS\AirSinglePipe.cs:line 560
   at Orts.Simulation.RollingStocks.MSTSWagon.Update(Single elapsedClockSeconds) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\RollingStocks\MSTSWagon.cs:line 1361
   at Orts.Simulation.Physics.Train.physicsUpdate(Single elapsedClockSeconds) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\Physics\Train.cs:line 1737
   at Orts.Simulation.Physics.Train.Update(Single elapsedClockSeconds) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\Physics\Train.cs:line 1617
   at Orts.Simulation.AIs.AITrain.AIUpdate(Single elapsedClockSeconds, Double clockTime, Boolean preUpdate) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\AIs\AITrain.cs:line 661
   at Orts.Simulation.AIs.AI.AIUpdate(Single elapsedClockSeconds, Boolean preUpdate) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\AIs\AI.cs:line 663
   at Orts.Simulation.Simulator.Update(Single elapsedClockSeconds) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\Orts.Simulation\Simulation\Simulator.cs:line 747
   at Orts.Viewer3D.Viewer.Update(RenderFrame frame, Single elapsedRealTime) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\RunActivity\Viewer3D\Viewer.cs:line 702
   at Orts.Viewer3D.Processes.GameStateViewer3D.Update(RenderFrame frame, Double totalRealSeconds) in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\RunActivity\Viewer3D\Processes\GameStateViewer3D.cs:line 121
   at Orts.Viewer3D.Processes.UpdaterProcess.Update() in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\RunActivity\Viewer3D\Processes\UpdaterProcess.cs:line 128
   at Orts.Viewer3D.Processes.UpdaterProcess.DoUpdate() in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\RunActivity\Viewer3D\Processes\UpdaterProcess.cs:line 108
   at Orts.Viewer3D.Processes.UpdaterProcess.UpdaterThread() in E:\Documents\Coding\Jenkins\jobs\Open Rails Stable\workspace\Source\RunActivity\Viewer3D\Processes\UpdaterProcess.cs:line 74
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()
ate/time = 10/30/2020 7:33:01 PM (2020-10-30 23:33:01Z)
BIOS = BIOS Date: 05/31/19 15:13:32 Ver: 04.06.05 (Dell Inc.)
Processor = Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (8 threads, 4 cores, 3.4 GHz) (L1-Cache 256 KB) (L2-Cache 1024 KB) (L3-Cache 8192 KB)
Memory = 8.0 GB
Video = NVIDIA GeForce GT 635 (1.0 GB RAM) (nvlddmkm 26.21.14.4587)
Display = \\.\DISPLAY1 (1920 x 1080, 32-bit, primary, 0 x 0)
Sound = Realtek High Definition Audio (rtkvhd64 6.0.1.7544)
Sound = NVIDIA High Definition Audio (nvhda64v 1.3.38.26)
Disk = C: (Local Fixed Disk, NTFS, 909.8 GB, 843.1 GB free)
Disk = D: (Removable Disk, )
Disk = E: (Removable Disk, )
Disk = F: (Removable Disk, )
Disk = G: (Removable Disk, )
Disk = H: (Removable Disk, )
Disk = I: (CD-ROM Disc, )
Disk = J: (Local Fixed Disk, NTFS, 5588.9 GB, 4205.7 GB free)
OS = Microsoft Windows 10 Pro 64-bit (10.0.19041)
Runtimes = 2.0.50727 SP2 3.0 SP2 3.5 SP1 4 Client 4 Full 4.0 Client
Runtime = 4.0.30319.42000 (32bit)
\\.\DISPLAY1 = NVIDIA GeForce GT 635 (nvldumd.dll 26.21.14.4587)
    Anisotropy = 16
    Render Targets = 4
    Streams = 16 (stride 255)
    Textures = 8 (16384 x 16384, repeat 8192, ratio 16384)
    Points = 8192^2
    Volumes = 2048^3
    Primitives = 16777215
    Vertexes = 16777215
    Vertex Shader = 3.0 (4096 slots, 256 constants)
    Pixel Shader = 3.0 (4096 slots)
    Clip Planes = 8
--------------------------------------------------------------------------------
Version = 1.3.1.4328
Build = 1.3.1.4328 (2000-01-02 02:24:16Z)
Logfile = C:\Users\dripe\Desktop\OpenRailsLog.txt
Executable = RunActivityLAA.exe
Argument = -start
Argument = -activity
Argument = J:\Microsoft Games\Train Simulator\ROUTES\CUT\ACTIVITIES\Eastbound 20th Century.act
--------------------------------------------------------------------------------
ActRandomizationLevel = (user set) 3
ActWeatherRandomizationLevel = (user set) 3
AdhesionFactor = (user set) 84
AdhesionFactorChange = (user set) 40
AdhesionMovingAverageFilterSize = 10
AdhesionProportionalToWeather = False
Alerter = (user set) True
AlerterDisableExternal = (user set) False
Autopilot = (user set) True
AuxActionEnabled = False
AvatarURL = http://openrails.org/images/support-logos.jpg
BrakePipeChargingRate = 21
BreakCouplers = False
Cab2DStretch = 0
CarVibratingLevel = 0
CircularSpeedGauge = False
ConditionalLoadOfDayOrNightTextures = (user set) True
CorrectQuestionableBrakingParams = False
CurveResistanceDependent = False
CurveSpeedDependent = False
DataLogger = False
DataLoggerSeparator = comma
DataLogMisc = False
DataLogPerformance = True
DataLogPhysics = False
DataLogSpeedUnits = route
DataLogStart = False
DataLogStationStops = False
DataLogSteamPerformance = False
DataLogTrainSpeed = (user set) True
DataLogTSContents = (user set) 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0
DataLogTSInterval = 10
DayAmbientLight = 20
DebriefActivityEval = False
DebriefEvalFilename = OR-DebriefEval.txt
DebriefTTActivityEval = False
DisableTCSScripts = False
DistantMountains = True
DistantMountainsViewingDistance = 40000
DoubleWire = (user set) True
DynamicShadows = False
ExtendedAIShunting = (user set) True
ExternalSoundPassThruPercent = 50
FastFullScreenAltTab = (user set) True
FullScreen = False
GraduatedRelease = False
HotStart = True
Language =
LODBias = (user set) -15
LODViewingExtention = False
Logging = True
LoggingFilename = OpenRailsLog.txt
LoggingPath = C:\Users\dripe\Desktop
Menu_Selection = (user set) J:\Microsoft Games\Train Simulator, J:\Microsoft Games\Train Simulator\ROUTES\CUT, J:\Microsoft Games\Train Simulator\ROUTES\CUT\ACTIVITIES\Eastbound 20th Century.act, , , , , ,
ModelInstancing = (user set) True
MSTSBINSound = True
Multiplayer = False
Multiplayer_Host = 127.0.0.1
Multiplayer_Port = 30000
Multiplayer_UpdateInterval = 10
Multiplayer_User = (user set) trainman
MultiplayerClient = False
MultiplayerServer = False
NoForcedRedAtStationStops = (user set) True
OpenDoorsInAITrains = (user set) True
OverrideNonElectrifiedRoutes = False
PerformanceTuner = (user set) True
PerformanceTunerTarget = 60
PrecipitationBoxHeight = 100
PrecipitationBoxLength = 500
PrecipitationBoxWidth = 500
PreferDDSTexture = False
PressureUnit = Automatic
Profiling = False
ProfilingFrameCount = 0
ProfilingTime = 0
ReplayPauseBeforeEnd = True
ReplayPauseBeforeEndS = 0
RetainersOnAllCars = False
ScreenshotPath = C:\Users\dripe\Pictures\Open Rails
ShaderModel = 3
ShadowAllShapes = False
ShadowMapBlur = True
ShadowMapCount = 4
ShadowMapDistance = 1000
ShadowMapResolution = 1024
ShowAvatar = False
ShowErrorDialogs = True
SignalLightGlow = False
SoundDetailLevel = 5
SoundVolumePercent = 100
SpeedControl = True
SuperElevationGauge = 1435
SuperElevationMinLen = 50
SuppressConfirmations = False
SuppressShapeWarnings = (user set) False
TTCreateTrainOnPoolUnderflow = True
TTOutputTimetableFullEvaluation = False
TTOutputTimetableTrainInfo = False
TTUseRestartDelays = True
TunnelResistanceDependent = (user set) True
Units = Automatic
UseAdvancedAdhesion = True
UseLargeAddressAware = True
UseLocationPassingPaths = (user set) True
UseMSTSEnv = (user set) True
UseSuperElevation = 0
VerticalSync = False
ViewDispatcher = (user set) True
ViewingDistance = 2000
ViewingFOV = 45
WindowGlass = (user set) True
WindowPosition_Activity = (user set) 89, 6
WindowPosition_CarOperations = 50, 50
WindowPosition_Compass = 50, 0
WindowPosition_ComposeMessage = 50, 50
WindowPosition_DriverAid = 100, 100
WindowPosition_Help = 50, 50
WindowPosition_NextStation = (user set) 89, 0
WindowPosition_Quit = 50, 50
WindowPosition_Switch = (user set) 100, 37
WindowPosition_TrackMonitor = 100, 0
WindowPosition_TrainList = 100, 0
WindowPosition_TrainOperations = 50, 50
WindowSize = (user set) 1920x1080
WindResistanceDependent = False
Wire = True
WorldObjectDensity = 10
YoungestFailedToRestore = 0
--------------------------------------------------------------------------------