I was working on a file and the next time i reopen it, it shows this error and is unable to open

Untreated exception: Exception of type 'System.OutOfMemoryException' was thrown.

System.OutOfMemoryException

Exception of type 'System.OutOfMemoryException' was thrown.

at Dial.Dialux.InteractionProjectHandling.Base.ProjectHandling.LoadProject(String filename, LoadProjectType loadProjectType)

at Dial.Dialux.Gui.MainWindowFileHandling.OpenFile(String filename, LoadProjectType loadProjectType)

at Dial.Dialux.Gui.MainWindowFileHandling.HandleLoadProject(ExecutedRoutedEventArgs args, LoadProjectType loadProjectType)

at Dial.Dialux.Gui.MainWindowFileHandling.OnCommandLoadProject(Object sender, ExecutedRoutedEventArgs args)

at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)

at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)

at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)

at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)

at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)

at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)

at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)

at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)

at System.Windows.Input.RoutedCommand.Execute(Object parameter, IInputElement target)

at Dial.Dialux.Gui.MainWindow.<DelayedInit>b__83_3()

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)