Issue with SAMFire on a single-component signal

samfire1.py

>>> m = sc.create_model(auto_add_lines=False)
>>> samf = m.create_samfire()

[0:apply]: 
---------------------------------------------------------------------------AttributeError                            Traceback (most recent call last)<string> in <module>()
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/samfire_utils/samfire_pool.py in <lambda>(worker, m_dict)
    148             self.rworker = ipp_Reference('worker')
    149             direct_view.apply(lambda worker, m_dict:
--> 150                               worker.create_model(m_dict, 'z'), self.rworker,
    151                               m_dict)
    152             direct_view.apply(lambda worker, ts: worker.setup_test(ts),
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/samfire_utils/samfire_worker.py in create_model(self, signal_dict, model_letter)
     58                 par.map = par.map.copy()
     59 
---> 60         var = self.model.signal.metadata.Signal.Noise_properties.variance
     61         if isinstance(var, BaseSignal):
     62             var.data = var.data.copy()
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/misc/utils.py in __getattribute__(self, name)
    333             name = name.decode()
    334         name = slugify(name, valid_variable_name=True)
--> 335         item = super(DictionaryTreeBrowser, self).__getattribute__(name)
    336         if isinstance(item, dict) and '_dtb_value_' in item and "key" in item:
    337             return item['_dtb_value_']
AttributeError: 'DictionaryTreeBrowser' object has no attribute 'Noise_properties'

[1:apply]: 
---------------------------------------------------------------------------AttributeError                            Traceback (most recent call last)<string> in <module>()
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/samfire_utils/samfire_pool.py in <lambda>(worker, m_dict)
    148             self.rworker = ipp_Reference('worker')
    149             direct_view.apply(lambda worker, m_dict:
--> 150                               worker.create_model(m_dict, 'z'), self.rworker,
    151                               m_dict)
    152             direct_view.apply(lambda worker, ts: worker.setup_test(ts),
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/samfire_utils/samfire_worker.py in create_model(self, signal_dict, model_letter)
     58                 par.map = par.map.copy()
     59 
---> 60         var = self.model.signal.metadata.Signal.Noise_properties.variance
     61         if isinstance(var, BaseSignal):
     62             var.data = var.data.copy()
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/misc/utils.py in __getattribute__(self, name)
    333             name = name.decode()
    334         name = slugify(name, valid_variable_name=True)
--> 335         item = super(DictionaryTreeBrowser, self).__getattribute__(name)
    336         if isinstance(item, dict) and '_dtb_value_' in item and "key" in item:
    337             return item['_dtb_value_']
AttributeError: 'DictionaryTreeBrowser' object has no attribute 'Noise_properties'

[2:apply]: 
---------------------------------------------------------------------------AttributeError                            Traceback (most recent call last)<string> in <module>()
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/samfire_utils/samfire_pool.py in <lambda>(worker, m_dict)
    148             self.rworker = ipp_Reference('worker')
    149             direct_view.apply(lambda worker, m_dict:
--> 150                               worker.create_model(m_dict, 'z'), self.rworker,
    151                               m_dict)
    152             direct_view.apply(lambda worker, ts: worker.setup_test(ts),
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/samfire_utils/samfire_worker.py in create_model(self, signal_dict, model_letter)
     58                 par.map = par.map.copy()
     59 
---> 60         var = self.model.signal.metadata.Signal.Noise_properties.variance
     61         if isinstance(var, BaseSignal):
     62             var.data = var.data.copy()
/Users/thomas/Dropbox/0_Git/GitHub/hyperspy_aar/hyperspy/misc/utils.py in __getattribute__(self, name)
    333             name = name.decode()
    334         name = slugify(name, valid_variable_name=True)
--> 335         item = super(DictionaryTreeBrowser, self).__getattribute__(name)
    336         if isinstance(item, dict) and '_dtb_value_' in item and "key" in item:
    337             return item['_dtb_value_']
AttributeError: 'DictionaryTreeBrowser' object has no attribute 'Noise_properties'