Exception changing schema-view options

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Clicked on Show Existing Objects
2..
3..

What is the expected output? What do you see instead?
Object reference not set to an instance of an object.
   at DBDiff.Front.SchemaTreeView.RebuildSchemaTree()
   at DBDiff.Front.SchemaTreeView.chkShowExistingObjects_CheckedChanged(Object sender, EventArgs e)
   at System.Windows.Forms.CheckBox.OnCheckedChanged(EventArgs e)
   at System.Windows.Forms.CheckBox.set_CheckState(CheckState value)
   at System.Windows.Forms.CheckBox.OnClick(EventArgs e)
   at System.Windows.Forms.CheckBox.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.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)

What version of the product are you using? On what operating system?
.4.0.0

Please provide any additional information below.
.

Original issue reported on code.google.com by calebmat...@gmail.com on 29 Jul 2010 at 3:44

[GoogleCodeExporter]

OS - Windows 7

Note - Discovered other errors due to the fact that I was not setup as an 
administrator on the computer, ie. error updating the xml file in the program 
file directory.

Original comment by calebmat...@gmail.com on 29 Jul 2010 at 4:01

[GoogleCodeExporter]

OS - Windows 7

Note - Discovered other errors due to the fact that I was not setup as an 
administrator on the computer, ie. error updating the xml file in the program 
file directory. 

Changed this.

Now it works.

Original comment by calebmat...@gmail.com on 29 Jul 2010 at 4:02