The SVG viewer and NGraphviz can causes some common failure that are easy to workaround, i.e. I don't plan to fix them soon ;)

1.

 Diagnosys: The first time you run the Adobe SVG viewer, a copyright dialog pops up. After that, you will hit this failure.
 Workaround: Close Reflector and rerun. The dialog is gone and everything works fine.

Object reference not set to an instance of an object.

System.NullReferenceException

  at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
  at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+
IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
  at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
  at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
  at System.Windows.Forms.Application.DoEvents()
  at _121._1(String )
  at _4.set_Visible(Boolean value)
  at Reflector.Framework.PackageBase.commandBar_Click(Object sender, EventArgs args)
  at _78.OnClick(EventArgs e)
  at _78.PerformClick()
  at _1.OnClick(EventArgs e)
  at System.Windows.Forms.MenuItemData.Execute()
  at System.Windows.Forms.Command.Invoke()
  at System.Windows.Forms.Control.WmCommand(Message& m)
  at System.Windows.Forms.Control.WndProc(Message& m)
  at _76.WndProc(Message& message)
  at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
  at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
  at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

2.

    Diagnosys: You don't have the necessary C++ libraries on your machine to run NGraphviz.
    Workaround: make sure msvcp71.dll and msvcr71.dll are available.

The specified module could not be found. (Exception from HRESULT: 0x8007007E)

System.IO.FileNotFoundException

  at NGraphviz.Helpers.Dot.Run(GraphvizImageType imageType, String dotCode, String outputFileName)
  at QuickGraph.Algorithms.Graphviz.GraphvizAlgorithm.Write(String outputFileName)
  at Reflector.Graph.Graphs.StatementGraphRenderer.Render(String fileName)
  at Reflector.Graph.StatementGraphControl.Translate()
  at Reflector.Framework.InternetExplorerControl.OnParentChanged(EventArgs e)
  at System.Windows.Forms.Control.AssignParent(Control value)
  at System.Windows.Forms.Control.ControlCollection.Add(Control value)
  at _134._1(IWindow )
  at _121._1(String )
  at _121._4.set_Visible(Boolean value)
  at Reflector.Framework.PackageBase.commandBar_Click(Object sender, EventArgs args)
  at _78.OnClick(EventArgs e)
  at _78.PerformClick()
  at _83._1.OnClick(EventArgs e)
  at System.Windows.Forms.MenuItem.MenuItemData.Execute()
  at System.Windows.Forms.Command.Invoke()
  at System.Windows.Forms.Command.DispatchID(Int32 id)
  at System.Windows.Forms.Control.WmCommand(Message& m)
  at System.Windows.Forms.Control.WndProc(Message& m)
  at System.Windows.Forms.TreeView.WndProc(Message& m)
  at _2.WndProc(Message& message)
  at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
  at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
  at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)