File "/usr/lib/python2.7/dist-packages/tryton/gui/window/form.py", line 325, in sig_import
    win.run()

  File "/usr/lib/python2.7/dist-packages/tryton/gui/window/win_import.py", line 336, in run
    return self.import_csv(csv_data, fields, self.model)

  File "/usr/lib/python2.7/dist-packages/tryton/gui/window/win_import.py", line 357, in import_csv
    rpc.CONTEXT)

  File "/usr/lib/python2.7/dist-packages/tryton/rpc.py", line 190, in execute
    return _execute(True, *args)

  File "/usr/lib/python2.7/dist-packages/tryton/rpc.py", line 174, in _execute
    result = getattr(CONNECTION, name)(*args)

  File "/usr/lib/python2.7/xmlrpclib.py", line 1224, in __call__
    return self.__send(self.__name, args)

  File "/usr/lib/python2.7/dist-packages/tryton/jsonrpc.py", line 282, in __request
    verbose=self.__verbose

  File "/usr/lib/python2.7/xmlrpclib.py", line 1264, in request
    return self.single_request(host, handler, request_body, verbose)

  File "/usr/lib/python2.7/xmlrpclib.py", line 1312, in single_request
    response.msg,