Ah, OK, understood! In case you find you need to add a small bit of custom C++ code to an otherwise "standard" NESTML neuron model, you could also add this into the Jinja templates, optionally with an extra clause like {% if neuronName == "my_custom_neuron_model" %} ... {% endif %}. Optionally you can make a copy of the default templates and specify the paths to the customized copy via the mechanism described at https://nestml.readthedocs.io/en/latest/extending.html#running-nestml-with-c...

Please let me know in case you run into any trouble should you decide to give this approach a chance.

On Fri, Jan 13, 2023, at 14:45, Beck Strohmer wrote:

Hi Charl, Yes, I actually started out in NESTML and was able to integrate a new neuron model in NEST so it worked really well. Unfortunately, I need to add gap junction support to my neuron model which is why I was forced to code "by hand".

On Fri, Jan 13, 2023 at 2:41 PM Charl Linssen nest-users@turingbirds.com wrote:

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Hi,

This is not addressing your actual question, but I just wanted to check whether you know about NESTML for writing custom neuron models (https://nestml.readthedocs.org/) and whether there were any reasons you might prefer to write the model "by hand" in C++ (there certainly might be! Just curious.)

With kind regards, Charl

On Fri, Jan 13, 2023, at 14:38, bstrohmer@gmail.com wrote:

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I would like to install a custom neuron model in NEST so I followed the instructions for the nest-extension-module. It is able to build the .so files but it errors during the final install of the project as seen in the below message.

Install the project... -- Install configuration: "" -- Installing: /home/bs/git_repos/extension/nest-simulator/result/include/piftestmodule/pif_psc_alpha.h -- Installing: /home/bs/git_repos/extension/nest-simulator/result/lib/nest/piftestmodule.so -- Installing: /home/bs/git_repos/extension/nest-simulator/result/lib/nest/libpiftestmodule.so Traceback (most recent call last): File "<string>", line 1, in <module> File "/home/bs/git_repos/extension/nest-simulator/result/lib/python3.8/site-packages/nest/__init__.py", line 444 err = AttributeError(f"Cannot set attribute '{attr}' on module 'nest'")

I am trying to install one of the example neurons provided first (pif_psc_alpha) so I do not expect that it is an issue within the source files. Thanks for any advice in correcting this issue! _______________________________________________ NEST Users mailing list -- users@nest-simulator.org To unsubscribe send an email to users-leave@nest-simulator.org

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Hi Jochen, thanks for the response. I am using NEST 3.3 on Ubuntu 20.04.5 LTS which I installed from the command line (sudo apt-get install nest). However, when I build the nest-extension-module code it installs a fresh version of NEST from git (git clone https://github.com/nest/nest-simulator.git). I have followed the README from the extension module git (https://github.com/nest/nest-extension-module/). I cloned the repository to my local machine and then updated the CMakeLists.txt files in the outermost directory to have a unique short name for the module as well as read from the pif_psc_alpha.h file for the MODULE_HEADER. Finally, I updated the CMakeLists.txt in the src directory so that it only has one source (pif_psc_alpha.cpp pif_psc_alpha.h). These are the only changes that I make to the provided files. After this I run ./build.sh from the terminal, this installs the fresh NEST installation as mentioned above and it builds the .so files but errors on the installation. Let me know if I can provide any other details. Thanks!