i! Interesting, this works here without problems (vanilla Debian installation):
``` $ python3 Python 3.6.5rc1 (default, Mar 14 2018, 10:54:23) [GCC 7.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import neuron NEURON -- VERSION 7.5 master (6b4c19f) 2017-09-25 Duke, Yale, and the BlueBrain Project -- Copyright 1984-2016 See http://neuron.yale.edu/neuron/credits >>> ``` The "nrn" module is a built-in module. Do you have any bits of a different NEURON installation floating around that might interfere with the package? Could you run the Python interpreter in verbose mode (python3 -v) and try to import the module again (and paste the output)? That would help to determine what is different between the attempts to load the module. Cheers, Matthias -- I welcome VSRE emails. See http://vsre.info/