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Did you try running without the nrn_load_dll?

If you import neuron from a script in the folder with x86_64, i686, or whatever it should automatically find and load the compiled mechanisms. If that doesn't just work, can you tell us what platform you're running on?

The basic sequence is: start with a ChannelML model run the converter script to generate an NMODL mechanism compile the mechanism with: nrnivmodl launch NEURON insert the mechanism into a NEURON model You're missing the third step. When you launch NEURON after compiling the mechanism, you should see...

Your system is somehow finding the old Python library. When you compile, after the "sudo make install" try: "cd src/nrnpython" and "sudo python setup.py install". As far as compiling goes: if you're replacing a version built from the repository, then yes, you can safely...

I just set up NEURON for 32-bit Python on Windows 7 on my machine. Here's how: Install Windows 7 Install PythonXY Install the latest "alpha" version of NEURON 7.4 (for 32-bit, this is currently 1232+.i686 ) Set PYTHONPATH to include C:\nrn74w\lib\python and set NEURONHOME to C:\nrn74w. (Se...

Often one doesn't need to change init but rather wants to do additional things (e.g. assign state variables) during the initialization. If that's your situation, use an h.FInitializeHandler . It has options to specify when exactly things are done, but in the simplest use case, you just pass it a fun...

Can you copy and paste the NEURON banner that displays when you do the import? For example, on my computer, from inside Python: >>> import neuron NEURON -- VERSION 7.4 (1332:477da879a623) 2015-02-11 Duke, Yale, and the BlueBrain Project -- Copyright 1984-2015 See http://www.neuron.yale.edu/neuron/cr...

Now that I know you're trying to use other Python packages (e.g. btmorph), let me revise my earlier advice. The mingw version (and not the cygwin version) on the download page is the best for working with other packages. The reason I didn't recommend it earlier is because the GUI doesn't work in tha...

If you're using NEURON 7.3 or higher, the reaction-diffusion's morphology submodule will allow you to easily write a version of topology in pure Python. I haven't tested edge cases (i.e. connecting to positions other than the 1 end), but here's a version that does at least the basics: def topology()...

I'm command-line centric, but this is how I would do it: Open the NEURON 7.3 folder on your desktop (assuming you kept the default install options) Double click "mintty bash"; this gives you a terminal starting from your C:\ drive (which it calls /cygdrive/c/... ignore that) Change to the ...

To run a file in Python use execfile. For your example you would:

Set up the recording before h.run()'ing the simulation and you should be good. A few tips: - You'd have much shorter and more readable code if you used lists (think arrays) because then you could use for loops to automate things. - Actually, even as-is, you could still use a for loop to handle some ...

Vector.record takes a pointer which is denoted with the _ref_ syntax. You want vec1 = h.Vector() vec1.record(cell1.soma(0.5)._ref_v) That's cell dot section parens location dot _ref_ variable of interest (v, nai, etc...). NB: This assumes that soma is a Section not an array; if not, replace `soma` ...

With an IClamp , you have the same situation as with an Exp2Syn: there are many places on cell1 that could receive the current (the various dendrites, the soma, the axon), and you have to be specific. The syntax is similar to that for the synapse; to put a current clamp at the center (0.5) of cell1'...

These cells have morphology; it doesn't suffice to say connect to cell2, because that doesn't say where on cell2 you want to connect. The basic procedure is to create a mechanism for the post-synaptic side of the connection (e.g. an Exp2Syn ) at a given location on the post-synaptic cell and then ma...

Stepping back a bit, if the goal is to use Python to create a network of some fixed pool of cell types, it's probably easiest and most efficient to use NEURON's GUI tools to convert swc files into cell templates (this is a manual process, but you only have to do it once per cell type) rather than ha...