I was in paper view adding the final touches to the title block (copy/paste text and a rectangle). I then saved the file and went to export it to a PDF and AutoCAD shut itself down.

I re-opened AutoCAD and opened the file from the recovery window and got the error "Object reference not set to an instance of an object." If I click 'Continue', the same error message keeps popping up.

I closed AutoCAD and rebooted my machine. I opened AutoCAD and tried to open the file that I saved just before AutoCAD crashed. I get the same error message. I am unable to get any further in AutoCAD because of this error message.

Is there any way to save this file or am I doomed to start over on this drawing?

Here's the Exception Text:
************* Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at Autodesk.Aec.AecLayerManagerEx.standardFilter_Upda te(Object sender, UpdateUIEventArgs e)
at Autodesk.AutoCAD.LayerManager.MenuItem.UpdateItem( Boolean toolbarUpdate)
at Autodesk.AutoCAD.LayerManager.ToolBarButton.Update Item()
at Autodesk.AutoCAD.LayerManager.LayerManagerControl. Application_Idle(Object sender, EventArgs e)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at Autodesk.AutoCAD.ApplicationServices.Core.Applicat ion.OnIdle()