All I did was Create a new workspace, and closed the old workspace.
2015-09-26 18:21:03:105 Starting server message polling timer with interval 300 seconds...
2015-09-26 18:21:23:226 *************** unhandled exception trapped ***************
2015-09-26 18:21:23:226 Collection was modified; enumeration operation may not execute.
2015-09-26 18:21:23:239 System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.Collections.Generic.List`1.Enumerator.MoveN extRare()
at System.Linq.Enumerable.<OfTypeIterator>d__aa`1.Mov eNext()
at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source, Func`2 predicate)
at NinjaTrader.Gui.Chart.Chart.<>c__DisplayClass46_0. <HookEventHandlers>b__8(Object sender, EventArgs args)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at NinjaTrader.Gui.Tools.NTWindow.OnClosed(EventArgs e)
at System.Windows.Window.WmDestroy()
at System.Windows.Window.WindowFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.PublicHooksFilte rMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation( Object o)
at System.Windows.Threading.ExceptionWrapper.Internal RealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCat chWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
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