Problem when running `se.NumpyRecording.dump()`

Hello!

I am running into the follwing AssertionErrorr when running se.NumpyRecording.dump(/path/to.json):

AssertionError                            Traceback (most recent call last)
~/d/n2b/n2b-visification/scripts/io.py in <module>
     25 # save RecordingExtractor
     26 print('Saving recording to {}'.format(OUTPUT_PATH))
---> 27 recording.dump(OUTPUT_PATH)
     28 print('Finished saving recording.')

~/anaconda/envs/visification/lib/python3.7/site-packages/spikeinterface/core/base.py in dump(self, file_path, relative_to, folder_metadata)
    394         """
    395         if str(file_path).endswith('.json'):
--> 396             self.dump_to_json(file_path, relative_to=relative_to, folder_metadata=folder_metadata)
    397         elif str(file_path).endswith('.pkl') or str(file_path).endswith('.pickle'):
    398             self.dump_to_pickle(file_path, relative_to=relative_to, folder_metadata=folder_metadata)

~/anaconda/envs/visification/lib/python3.7/site-packages/spikeinterface/core/base.py in dump_to_json(self, file_path, relative_to, folder_metadata)
    412             If not None, file_paths are serialized relative to this path
    413         '''
--> 414         assert self.check_if_dumpable()
    415         dump_dict = self.to_dict(include_annotations=True,
    416                                  include_properties=False,

AssertionError: 

However, the final AssertionError is not printing anything, so I am not quite sure what the issue is. The OUTPUT_PATH is 161.json, by the way.

[samuelgarcia]

Yes.

cached = numpy_recording.save(folder='your-folder')
# and then later
cached2 = load_extractor('your-folder')

cached and cached2 are totaly equivalent and are lazy.

[marcoistasy]

Chunking did the trick!