Vector.as_numpy() error in Anaconda IPython

[luke]

Hi all,

We've installed the latest neuron 64 bit as recommended (in the guide https://www.neuron.yale.edu/ftp/neuron/ ... nstall.pdf) on two machines (one windows 7, one windows 10). Neuron works fine, also when not started via the nrniv_python shortcut but imported inside an IPython console session. However, in the latter case the function Vector.as_numpy() throws the following error:

Code: Select all

In [1]: from neuron import h
NEURON -- Release 7.4 (1370:16a7055d4a86) 2015-11-09
Duke, Yale, and the BlueBrain Project -- Copyright 1984-2015
See http://www.neuron.yale.edu/neuron/credits


In [2]: import numpy

In [3]: ta = h.Vector(range(10))

In [4]: tb = ta.as_numpy()
NEURON: Vector.as_numpy() error
 near line 0
 objref hoc_obj_[2]
                   ^
        Vector[0].as_numpy()
oc_restore_code tobj_count=1 should be 0
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-4-5dd7ac0d1976> in <module>()
----> 1 tb = ta.as_numpy()

RuntimeError: hoc error

If neuron is run via the nrniv_python shortcut, it works fine and gives the following output:

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>>> from neuron import h
>>> import numpy
>>> ta = h.Vector(range(10))
>>> tb = ta.as_numpy()
>>> tb
array([ 0.,  1.,  2.,  3.,  4.,  5.,  6.,  7.,  8.,  9.])

Is there any way to fix this? It would be convenient to run our NEURON code with the IPython console and e.g. the Spyder IDE that comes with Anaconda.

Cheers,
Lucas.

[luke]

Update: this seems to be fixed in the 7.5 alpha release downloaded at https://www.neuron.yale.edu/ftp/neuron/ ... -setup.exe