[MonoDevelop] Newbie - MonoDevelop Crashing

Andrew Myers am2605 at gmail.com
Tue Oct 5 07:44:25 EDT 2010


I'm a complete Newbie to Mono and C# but have other programming experience
and am trying to work my way through the tutorial at this location -

MonoDevelop has closed a number of times unexpectedly on me, one of which it
gave the error below.  At this point I was editing the OnExit function as
described towards the end of Step 2a in the above tutorial.

I am using Windows 7, MonoDevelop 2.4 with Gtk# for .Net 2.12.9 installed
(no other versions installed as far as I can tell from Windows' Control
Panel -> Programs and Features).

Has anyone got any ideas on what I'm doing wrong?  MonoDevelop looks great
and I am pretty keen to look at it further if I can figure out these issues.

Many thanks in advance,


System.Reflection.TargetInvocationException: Exception has been thrown by
the target of an invocation. ---> System.NullReferenceException: Object
reference not set to an instance of an object.

   at Stetic.Editor.EditableLabel.set_Text(String value)

   at Stetic.Editor.ActionGroupEditor.OnGroupChanged(Object s,
ObjectWrapperEventArgs args)

   at Stetic.ObjectWrapperEventHandler.Invoke(Object sender,
ObjectWrapperEventArgs args)

   at Stetic.ObjectWrapper.OnObjectChanged(ObjectWrapperEventArgs args)

   at Stetic.ObjectWrapper.FireObjectChangedEvent()

   at Stetic.AtomicChangeTracker.Dispose()

   at Stetic.Editor.ActionMenuItem.EndEditing(Key exitKey)

   at Stetic.Editor.ActionItem.OnSelectionDisposed(Object ob, EventArgs a)

   at Stetic.ObjectSelection.FireDisposed()

   at Stetic.ResizableFixed.ResetSelection(Widget widget)

   at Stetic.ResizableFixed.SelectionDestroyed(Object obj, EventArgs args)

   at Gtk.Object.OnDestroyed()

   at Gtk.Object.NativeDestroy(Object o, EventArgs args)

   --- End of inner exception stack trace ---

   at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[]
arguments, SignatureStruct& sig, MethodAttributes methodAttributes,
RuntimeTypeHandle typeOwner)

   at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[]
arguments, Signature sig, MethodAttributes methodAttributes,
RuntimeTypeHandle typeOwner)

   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean

   at System.Delegate.DynamicInvokeImpl(Object[] args)

   at GLib.Signal.ClosureInvokedCB(Object o, ClosureInvokedArgs args)

   at GLib.SignalClosure.Invoke(ClosureInvokedArgs args)

   at GLib.SignalClosure.MarshalCallback(IntPtr raw_closure, IntPtr
return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr
invocation_hint, IntPtr marshal_data)
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