[Zope-CMF] KeyError in ExtFile (CMFOptions)

[Gitte Wange]

Hello,

I want to use the CMFOptions so I can upload files to the filesystem.
But when I try to add an external file I get the following error:


                                         Zope Error

                                         Zope has encountered an error while 
publishing this resource.

                                         Error Type: KeyError
                                         Error Value: id



                                         Troubleshooting Suggestions

                                                This resource may be trying 
to reference a nonexistent object or variable id. 
                                                The URL may be incorrect. 
                                                The parameters passed to this 
resource may be incorrect. 
                                                A resource that this resource 
relies on may be encountering an error. 

                                         For more detailed information about 
the error, please refer to the HTML source for this page. 

                                         If the error persists please contact 
the site maintainer. Thank you for your patience. 



Traceback (innermost last):
  File /usr/local/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 223, in publish_module
  File /usr/local/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 187, in publish
  File /usr/local/Zope-2.3.0-linux2-x86/lib/python/Zope/__init__.py, line 
221, in zpublisher_exception_hook
    (Object: CatalogAware)
  File /usr/local/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 171, in publish
  File /usr/local/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/mapply.py, line 
160, in mapply
    (Object: CMFExtFile_edit_form)
  File /usr/local/Zope-2.3.0-linux2-x86/lib/python/ZPublisher/Publish.py, 
line 112, in call_object
    (Object: CMFExtFile_edit_form)
  File 
/usr/local/Zope-2.3.0-linux2-x86/lib/python/Products/CMFCore/FSDTMLMethod.py, 
line 218, in __call__
    (Object: CMFExtFile_edit_form)
  File 
/usr/local/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_String.py, 
line 538, in __call__
    (Object: CMFExtFile_edit_form)
  File 
/usr/local/Zope-2.3.0-linux2-x86/lib/python/DocumentTemplate/DT_Var.py, line 
276, in render
    (Object: id)
KeyError: (see above)


Anyone who have had this error and know how to fix it ?