Object reference not set to an instance of an object.

Server Version : 1.3.0.96 Studio Version : 1.3.0.96 Email Address : hagashen.naidu@dev2.co.za Steps to follow : Select Dependencies.. .Deploy at Infragistics.Controls.Menus.NodesManager.ItemSource_PropertyChanged(Object sender, PropertyChangedEventArgs e) at System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e) at Microsoft.Practices.Prism.Mvvm.BindableBase.OnPropertyChanged(String propertyName) at Warewolf.Studio.ViewModels.ExplorerItemViewModel.set_IsSelected(Boolean value) at Warewolf.Studio.ViewModels.ExplorerItemViewModel.set_IsResourceChecked(Nullable`1 value) at Warewolf.Studio.ViewModels.SingleExplorerDeployViewModel.<>c.b__55_2(IExplorerItemViewModel a) at Caliburn.Micro.ExtensionMethods.Apply[T](IEnumerable`1 enumerable, Action`1 action) at Warewolf.Studio.ViewModels.SingleExplorerDeployViewModel.SelectDependencies() at Microsoft.Practices.Prism.Commands.DelegateCommand.<>c__DisplayClass6.<.ctor>b__2(Object o) at Microsoft.Practices.Prism.Commands.DelegateCommandBase.<>c__DisplayClass2.<.ctor>b__0(Object arg) at Microsoft.Practices.Prism.Commands.DelegateCommandBase.d__7.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Practices.Prism.Commands.DelegateCommandBase.d__4.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.b__6_0(Object state) 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)