Error appears on opening wizard definitions xml file


Server OS: Win2K8R2
Workstation OS: Win7 SP1
MDT Version: 6.1.2369.0

Error occurs both when run over RDP onto the MDT server connecting locally to the wizard definition file, and when run locally on the workstation, connecting to the xml file via UNC.

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at WizardEditor.MainForm.LoadCode()
at WizardEditor.MainForm.paneTree_AfterSelect(Object sender, TreeViewEventArgs e)
at System.Windows.Forms.TreeView.TvnSelected(NMTREEVIEW* nmtv)
at System.Windows.Forms.TreeView.WmNotify(Message& m)
at System.Windows.Forms.TreeView.WndProc(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)

************** Loaded Assemblies **************
Assembly Version:
Win32 Version: 2.0.50727.5466 (Win7SP1GDR.050727-5400)

CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll

Assembly Version:
Win32 Version:

CodeBase: file:///F:/WizardEditor.exe

Assembly Version:
Win32 Version: 2.0.50727.5468 (Win7SP1GDR.050727-5400)

CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/

Assembly Version:
Win32 Version: 2.0.50727.5467 (Win7SP1GDR.050727-5400)

CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/

Assembly Version:
Win32 Version: 2.0.50727.5467 (Win7SP1GDR.050727-5400)

CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/

Assembly Version:
Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)

CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Xml/

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging

For example:

<system.windows.forms jitDebugging="true" />

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.