"New" have an issue

[ThatOneMinto]

Acknowledgement

• [x] I have read Getting-Started and FAQ

🐛 Describe the bug

Hiii, I am Minto.

I had some problems installing your programm, i have window x84 Open Utau and there's a big issue, idk if it's from an update or something like that but it doesn't let me do a new file, it stop running and crash after 3 seconds.

IDK WHAT TO DO PLEASE HELP sob sob

thanks!

Explains how to reproduce the bug

1- Open the app 2- click on "NEw project" 3- waits 4- stop running 5- crash out

OS & Version

Windows 10!

Logs

srly this is my first time in this so idk

[adlez27]

There should be a Logs folder either in the folder where you have OpenUtau (portable) or in Documents (installer).

[ThatOneMinto]

i wish this is the logs folder. idk what to do fr also thanks for answering

[ThatOneMinto]

wait. OMG I FORGOT TO PUT IT ALL

log20251029.txt log20251029_001.txt log20251102.txt

[BagelHero]

2025-11-02 16:01:04.469 -06:00 [ERR] Unhandled exception
System.NullReferenceException: Object reference not set to an instance of an object.
   at OpenUtau.App.Controls.PartsCanvas.<.ctor>b__26_4(TimeAxisChangedEvent e) in D:\a\OpenUtau\OpenUtau\OpenUtau\Controls\PartsCanvas.cs:line 100
   at System.Reactive.AnonymousSafeObserver`1.OnNext(T value)
   at System.Reactive.Sink`1.ForwardOnNext(TTarget value)
   at System.Reactive.Linq.ObservableImpl.Skip`1.Count._.OnNext(TSource value)
   at System.Reactive.SafeObserver`1.WrappingSafeObserver.OnNext(TSource value)
   at System.Reactive.Sink`1.ForwardOnNext(TTarget value)
   at System.Reactive.ObserveOnObserverNew`1.DrainStep(ConcurrentQueue`1 q)
   at System.Reactive.ObserveOnObserverNew`1.DrainShortRunning(IScheduler recursiveScheduler)
   at System.Reactive.ObserveOnObserverNew`1.<>c.<.cctor>b__17_0(IScheduler scheduler, ObserveOnObserverNew`1 self)
   at System.Reactive.Concurrency.CurrentThreadScheduler.Schedule[TState](TState state, TimeSpan dueTime, Func`3 action)
   at System.Reactive.Concurrency.LocalScheduler.Schedule[TState](TState state, Func`3 action)
   at System.Reactive.ObserveOnObserverNew`1.Schedule()
   at System.Reactive.ObserveOnObserverNew`1.OnNext(T value)
   at System.Reactive.Subjects.BehaviorSubject`1.OnNext(T value)
   at ReactiveUI.ScheduledSubject`1.OnNext(T value) in /_/src/ReactiveUI/Scheduler/ScheduledSubject.cs:line 52
   at ReactiveUI.MessageBus.SendMessage[T](T message, String contract) in /_/src/ReactiveUI/Routing/MessageBus.cs:line 129
   at OpenUtau.App.ViewModels.PlaybackViewModel.OnNext(UCommand cmd, Boolean isUndo) in D:\a\OpenUtau\OpenUtau\OpenUtau\ViewModels\PlaybackViewModel.cs:line 88
   at OpenUtau.Core.DocManager.Publish(UCommand cmd, Boolean isUndo) in D:\a\OpenUtau\OpenUtau\OpenUtau.Core\DocManager.cs:line 353
   at OpenUtau.Core.DocManager.ExecuteCmd(UCommand cmd) in D:\a\OpenUtau\OpenUtau\OpenUtau.Core\DocManager.cs:line 225
   at OpenUtau.App.ViewModels.MainWindowViewModel.NewProject() in D:\a\OpenUtau\OpenUtau\OpenUtau\ViewModels\MainWindowViewModel.cs:line 159
   at OpenUtau.App.Views.MainWindow.NewProject() in D:\a\OpenUtau\OpenUtau\OpenUtau\Views\MainWindow.axaml.cs:line 201
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
   at Avalonia.Threading.SendOrPostCallbackDispatcherOperation.InvokeCore()
   at Avalonia.Threading.DispatcherOperation.Execute()
   at Avalonia.Threading.Dispatcher.ExecuteJob(DispatcherOperation job)
   at Avalonia.Threading.Dispatcher.ExecuteJobsCore(Boolean fromExplicitBackgroundProcessingCallback)
   at Avalonia.Threading.Dispatcher.Signaled()
   at Avalonia.Win32.Win32Platform.WndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
   at Avalonia.Win32.Interop.UnmanagedMethods.DispatchMessage(MSG& lpmsg)
   at Avalonia.Win32.Win32DispatcherImpl.RunLoop(CancellationToken cancellationToken)
   at Avalonia.Threading.DispatcherFrame.Run(IControlledDispatcherImpl impl)
   at Avalonia.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at Avalonia.Threading.Dispatcher.MainLoop(CancellationToken cancellationToken)
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.StartCore(String[] args)
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime(AppBuilder builder, String[] args, ShutdownMode shutdownMode)
   at OpenUtau.App.Program.Main(String[] args) in D:\a\OpenUtau\OpenUtau\OpenUtau\Program.cs:line 43

Pulled the error for intrepid readers who don't want to download. Seems to be a duplicate of #1784 Please check if your PC can possibly handle 64bit apps, if it can you can fix this issue by installing the correct version for your machine.

Please also be sure to download and install the .NET8 runtime and the latest c++ redistributable that matches your computer.