Whenever I click on a menu bar or close a form I call the following function:

private void EndBoxEditing()
{
if (EditedBox != null)
diagramView.EndEdit(true);
}

Edited box is set when I click on a node. The code being:

EditedBox = (ShapeNode)e.Node;
diagramView.BeginEdit(EditedBox);

EditedBox is set to null in the flowChart_NodeTextEdited function. This all seems to work 99% of the time but we have just got the following exception that seems to be in Mindfusion code:

HTA Exception at : 26/10/2009 00:25:33
Message : Object reference not set to an instance of an object.
Source : MindFusion.Diagramming.WinForms
Stack Trace :
at MindFusion.Diagramming.WinForms.DiagramView.EndEdit(Boolean accept)
at HierarchicalTaskAnalysis.HTAForm.EndBoxEditing()
at HierarchicalTaskAnalysis.HTAForm.HTAForm_FormClosing(Object sender, FormClosingEventArgs e)
at System.Windows.Forms.Form.OnFormClosing(FormClosingEventArgs e)
at System.Windows.Forms.Form.WmClose(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
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)

Yes, I do that - I mention it about half-way through my post.  Any other ideas?

DavidL

This exception very rarely occurs.  I will just monitor the situation for now and see if it becomes more reproducable.

Thanks for your help.

DavidL