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ReactiveUI.UnhandledErrorException: An object implementing IHandleObservableErrors (often a ReactiveCommand or ObservableAsPropertyHelper) has errored, thereby breaking its observable pipeline. To prevent this, ensure the pipeline does not error, or Subscr #1483

@verbal666

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@verbal666

What were you doing when VidCoder crashed?

Encoding (Failed!) this video
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https://drive.google.com/file/d/1QcQ5ZSi3jlB_8C7iqYBRTP5wAYlqKxz1/view?usp=sharing
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Crash details

VidCoder 12.17 VelopackInstaller
ReactiveUI.UnhandledErrorException: An object implementing IHandleObservableErrors (often a ReactiveCommand or ObservableAsPropertyHelper) has errored, thereby breaking its observable pipeline. To prevent this, ensure the pipeline does not error, or Subscribe to the ThrownExceptions property of the object in question to handle the erroneous case.
 ---> System.InvalidOperationException: Sequence contains no elements
   at System.Linq.ThrowHelper.ThrowNoElementsException()
   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
   at VidCoder.Services.ProcessingService.<get_StopEncode>b__172_0()
   at ReactiveUI.ReactiveCommand.<>c__DisplayClass0_0.<Create>b__1(IObserver`1 observer) in D:\a\ReactiveUI\ReactiveUI\src\ReactiveUI\ReactiveCommand\ReactiveCommand.cs:line 109
   at System.Reactive.Linq.QueryLanguage.CreateWithDisposableObservable`1.SubscribeCore(IObserver`1 observer) in /_/Rx.NET/Source/src/System.Reactive/Linq/QueryLanguage.Creation.cs:line 35
   at System.Reactive.ObservableBase`1.Subscribe(IObserver`1 observer) in /_/Rx.NET/Source/src/System.Reactive/ObservableBase.cs:line 58
   --- End of inner exception stack trace ---
   at ReactiveUI.RxApp.<>c__DisplayClass10_0.<.cctor>b__2() in D:\a\ReactiveUI\ReactiveUI\src\ReactiveUI\RxApp.cs:line 106
   at System.Reactive.Concurrency.Scheduler.<>c.<Schedule>b__74_0(IScheduler _, Action a) in /_/Rx.NET/Source/src/System.Reactive/Concurrency/Scheduler.Simple.cs:line 37
   at System.Reactive.Concurrency.DispatcherScheduler.<>c__DisplayClass12_0`1.<Schedule>b__0() in /_/Rx.NET/Source/src/System.Reactive/Platforms/Desktop/Concurrency/DispatcherScheduler.cs:line 98
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

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    crashA crash is when VidCoder shows an error dialog box then unexpectedly closes.

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