receptive filed plotting

[windform2015]

Hi, when I run the command measure_rfs, I got these errors

AttributeError Traceback (most recent call last)
in ()
----> 1 data=c(times=times)

/home/windform/env1/topographica/external/holoviews/holoviews/interface/collector.pyc in call(self, attrtree, times, strict)
552 task(attrtree, self.time_fn(), times)
553 else:
--> 554 task(attrtree_buffer, self.time_fn(), times)
555 attrtree.update(attrtree_buffer)
556

/home/windform/env1/topographica/external/holoviews/holoviews/interface/collector.pyc in call(self, attrtree, time, times)
292 return attrtree
293
--> 294 val = self._get_result(attrtree, time, times)
295 if val is None: return attrtree
296

/home/windform/env1/topographica/external/holoviews/holoviews/interface/collector.pyc in _get_result(self, attrtree, time, times)
278 resolvable = hasattr(self.obj, 'resolve')
279 obj = self.obj.resolve() if resolvable else self.obj
--> 280 return self.hook(obj, _self.args, *_self.kwargs)
281
282

/home/windform/env1/topographica/external/featuremapper/featuremapper/command.pyc in measurement_hook(obj, _args, *_kwargs)
1256
1257 def measurement_hook(obj, _args, *_kwargs):
-> 1258 return obj(_args, *_kwargs)
1259
1260 def pattern_hook(obj,_args, *_kwargs):

/home/windform/env1/topographica/external/param/param/parameterized.pyc in new(class_, _args, *params)
1845 inst = class.instance()
1846 inst.set_name(class.name)
-> 1847 return inst.call(_args,__params)
1848
1849 def call(self,_args,**kw):

/home/windform/env1/topographica/external/featuremapper/featuremapper/command.pyc in call(self, **params)
457 static_features=static_params,
458 pattern_response_fn=p.pattern_response_fn,
--> 459 pattern_generator=p.pattern_generator)
460 self._restore_presenter_defaults()
461

/home/windform/env1/topographica/external/param/param/parameterized.pyc in new(class_, _args, *params)
1845 inst = class.instance()
1846 inst.set_name(class.name)
-> 1847 return inst.call(_args,__params)
1848
1849 def call(self,_args,**kw):

/home/windform/env1/topographica/external/featuremapper/featuremapper/init.pyc in call(self, features, **params)
676 self._measure_responses(p)
677
--> 678 results = self._collate_results(p)
679
680 if p.measurement_storage_hook:

/home/windform/env1/topographica/external/featuremapper/featuremapper/init.pyc in _collate_results(self, p)
806 for i, ii in enumerate(rows):
807 for j, jj in enumerate(cols):
--> 808 coord = view.matrixidx2sheet(ii, jj)
809 im = Image(rc_response[i, j], input_metadata['bounds'],
810 label=out_label, group='Receptive Field',

AttributeError: 'GridSpace' object has no attribute 'matrixidx2sheet'

Could you help check how to fix this ? Thanks !