Could not create target noteboox HRESULT: 0x80042020

[msitekkie]

When I attempt to import my ENEX file I get:
Could not create the target notebook in Onenote!
System.Runtime.InteropServices.COMException (0x8004030): Exception from HRESULT:0x80042020 at Microsoft.Office.Interop.OneNote.IApplication.GetHierarchy(StringbstrStartNodeID, HierarchyScope hsScope, String& pbstrHierarchyXmlOut, XMLSchema) at Evernote2Onenote.MainFrm.StartSync()

I am using OneNote from Office 2010

Robin Penny