I've just started receiving an error when attempting to run the Configuration Wizard from the Business Object Mapper.  It has been running successfully prior to this.

The error is:

NullReferenceException
  Object reference not set to an instance of an object.

Source     : MicroFour StrataFrame AddIns

Stack Trace:
   at MicroFour.StrataFrame.AddIns.DTEprojectsBO.FillProjects(String[] ProjectPaths)
   at MicroFour.StrataFrame.AddIns.PartialClassBuilderCustomizeWizard.BuildProjectNode(PartialClassBuilderVSProject Project)
   at MicroFour.StrataFrame.AddIns.PartialClassBuilderCustomizeWizard.PopulateTreeView()
   at MicroFour.StrataFrame.AddIns.PartialClassBuilderCustomizeWizard.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(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.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)
   at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
   at MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Control.set_Visible(Boolean value)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
   at System.Windows.Forms.Form.ShowDialog()
   at MicroFour.StrataFrame.AddIns.PartialClassBuilderDialog.ShowWizard()

The only thing that has changed recently is that I enabled SQL debugging.

It also leaves a window hanging (Searching ... populating Tree View) when it crashes.

Any ideas what might be causing this?

Mark