Step 3 termMapping

[nsasanka]

I am running into an error while running the termMapping.ipynb pasted below is the error

TraitErrorTraceback (most recent call last)
in ()
----> 1 widgets.VBox(tms.initInterface())

/queries/TermMappingService.pyc in initInterface(self)
316 standardValWidget = widgets.Dropdown(
317 options=dropdownValues,
--> 318 value=selectedId
319 )
320

/usr/local/lib/python2.7/site-packages/ipywidgets/widgets/widget_selection.pyc in init(self, *args, **kwargs)
188 kwargs['label'], kwargs['value'] = options[0] if nonempty else (None, None)
189
--> 190 super(_Selection, self).init(*args, **kwargs)
191 self.initializing_traits = False
192

/usr/local/lib/python2.7/site-packages/ipywidgets/widgets/widget.pyc in init(self, **kwargs)
409 """Public constructor"""
410 self._model_id = kwargs.pop('model_id', None)
--> 411 super(Widget, self).init(**kwargs)
412
413 Widget._call_widget_constructed(self)

/usr/local/lib/python2.7/site-packages/traitlets/traitlets.pyc in init(self, *args, **kwargs)
998 else:
999 # passthrough args that don't set traits to super
-> 1000 super_kwargs[key] = value
1001 try:
1002 super(HasTraits, self).init(*super_args, **super_kwargs)

/usr/local/lib/python2.7/contextlib.pyc in exit(self, type, value, traceback)
22 if type is None:
23 try:
---> 24 self.gen.next()
25 except StopIteration:
26 return

/usr/local/lib/python2.7/site-packages/traitlets/traitlets.pyc in hold_trait_notifications(self)
1120 self._trait_values.pop(name)
1121 cache = {}
-> 1122 raise e
1123 finally:
1124 self._cross_validation_lock = False

TraitError: Invalid selection: value not found

Please let me know if there are any suggestions

Thanks