Error fetching synapses from minnie35

[schlegelp]

Hi. I've been trying to fetch synapses for 864691138134948293 (via minnie35_public_v0) and ran into the following error:

>>> client = CAVEclient('minnie35_public_v0') 
>>> pre = client.materialize.synapse_query(pre_ids=864691138134948293)

~/.pyenv/versions/3.7.5/lib/python3.7/site-packages/caveclient/frameworkclient.py in materialize(self)
    290                 datastack_name=self._datastack_name,
    291                 cg_client=self.chunkedgraph,
--> 292                 synapse_table=self.info.get_datastack_info().get("synapse_table", None),
    293             )
    294         return self._materialize

~/.pyenv/versions/3.7.5/lib/python3.7/site-packages/caveclient/materializationengine.py in MaterializationClient(server_address, datastack_name, auth_client, cg_client, synapse_table, api_version, version, verify)
    147         synapse_table=synapse_table,
    148         version=version,
--> 149         verify=verify,
    150     )
    151 

~/.pyenv/versions/3.7.5/lib/python3.7/site-packages/caveclient/materializationengine.py in __init__(self, server_address, auth_header, api_version, endpoints, server_name, datastack_name, cg_client, synapse_table, version, verify)
    175         self._datastack_name = datastack_name
    176         if version is None:
--> 177             version = self.most_recent_version()
    178         self._version = version
    179         self.cg_client = cg_client

~/.pyenv/versions/3.7.5/lib/python3.7/site-packages/caveclient/materializationengine.py in most_recent_version(self, datastack_name)
    212         """
    213         versions = self.get_versions(datastack_name=datastack_name)
--> 214         return np.max(np.array(versions))
    215 
    216     def get_versions(self, datastack_name=None):

<__array_function__ internals> in amax(*args, **kwargs)

~/.pyenv/versions/3.7.5/lib/python3.7/site-packages/numpy/core/fromnumeric.py in amax(a, axis, out, keepdims, initial, where)
   2753     """
   2754     return _wrapreduction(a, np.maximum, 'max', axis, None, out,
-> 2755                           keepdims=keepdims, initial=initial, where=where)
   2756 
   2757 

~/.pyenv/versions/3.7.5/lib/python3.7/site-packages/numpy/core/fromnumeric.py in _wrapreduction(obj, ufunc, method, axis, dtype, out, **kwargs)
     84                 return reduction(axis=axis, out=out, **passkwargs)
     85 
---> 86     return ufunc.reduce(obj, axis, dtype, out, **passkwargs)
     87 
     88 

ValueError: zero-size array to reduction operation maximum which has no identity

[sdorkenw]

Hi Philipp. Sorry about that. We have not uploaded the minnie35 synapses for querying just yet... Will ping you here when they are available.

[schlegelp]

Thanks! Casey beat you to the punchline on Slack :) I don't really need that specific neuron but thought I'd leave a report in case that was a bug.