System.Runtime.InteropServices.SEHException
  HResult=0x80004005
  Message=External component has thrown an exception.
  Source=TerraFX.Interop.Windows
  StackTrace:
   at TerraFX.Interop.ID3D12CommandQueue.ExecuteCommandLists(UInt32 NumCommandLists, ID3D12CommandList** ppCommandLists) in /_/sources/Interop/Windows/um/d3d12/ID3D12CommandQueue.cs:line 101
   at Dx.Vrg.<OnRender>g__RenderTargetTextureCopyBackToCpuExecute|92_9() in D:\_svn\Algorithmics\code\TrunkGit\WIF\Wif.Dx\Src\Vrg.cs:line 1758
   at Dx.Vrg.OnRender() in D:\_svn\Algorithmics\code\TrunkGit\WIF\Wif.Dx\Src\Vrg.cs:line 1672
   at DxWinForms.GfxPanel.UpdateGfx(Transform viewBoxToWorld) in D:\_svn\Algorithmics\code\TrunkGit\WIF\Wif.DxWinForms\Src\GfxPanel.cs:line 42
   at Viewport.RefreshAsNeeded(Boolean interactive) in D:\_svn\Algorithmics\code\TrunkGit\WIF\UiBase\Viewport.cs:line 7415
   at Collage.RefreshAsNeeded() in D:\_svn\Algorithmics\code\TrunkGit\WIF\UiBase\Collage.cs:line 11846
   at Collage.RefreshPicturesTimerAction() in D:\_svn\Algorithmics\code\TrunkGit\WIF\UiBase\Collage.cs:line 12156
   at Collage.RefreshPicturesTimer_Tick(Object sender, EventArgs e) in D:\_svn\Algorithmics\code\TrunkGit\WIF\UiBase\Collage.cs:line 12129
   at System.Windows.Forms.Timer.OnTick(EventArgs e)
   at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, WM msg, IntPtr wparam, IntPtr lparam)
   at Interop.User32.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.Interop.Mso.IMsoComponentManager.FPushMessageLoop(UIntPtr dwComponentID, msoloop uReason, Void* pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(msoloop reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(msoloop reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Dx.App.Program.Main() in D:\_svn\Algorithmics\code\TrunkGit\Demos\Dx\Dx.App\Src\Program.cs:line 29

  This exception was originally thrown at this call stack:
    TerraFX.Interop.ID3D12CommandQueue.ExecuteCommandLists(uint, TerraFX.Interop.ID3D12CommandList**) in ID3D12CommandQueue.cs
    Claron.WIF.Dx.Vrg.OnRender.__RenderTargetTextureCopyBackToCpuExecute|92_9() in Vrg.cs
    Claron.WIF.Dx.Vrg.OnRender() in Vrg.cs
    Claron.WIF.DxWinForms.GfxPanel.UpdateGfx(Claron.WIF.Dx.Transform) in GfxPanel.cs
    Claron.WIF.Viewport.RefreshAsNeeded(bool) in Viewport.cs
    Claron.WIF.Collage.RefreshAsNeeded() in Collage.cs
    Claron.WIF.Collage.RefreshPicturesTimerAction() in Collage.cs
    Claron.WIF.Collage.RefreshPicturesTimer_Tick(object, System.EventArgs) in Collage.cs
    System.Windows.Forms.Timer.OnTick(System.EventArgs)
    System.Windows.Forms.Timer.TimerNativeWindow.WndProc(ref System.Windows.Forms.Message)
    ...
    [Call Stack Truncated]