Hi Kwant Team, I tried running kwant again, but fail. <SIGH> (I posted this note as a reply to my original post about 48 weeks ago, but wasn't sure that that reply would feed properly. My apologizes if you see this post twice.) My system is Python 2.7.10 | 64-bit | (default, Oct 21 2015, 17:08:47) [MSC v.1500 64 bit (AMD64)] running inside Jupyter Notebook server 4.0.6. on Windows 7 Professional 64 bit OS. Here are versions of relevant libraries that are running: kwant==1.1.1 nose==1.3.4 numpy==1.9.2 scipy==0.16.1 six==1.10.0 tinyarray==1.1.0 matplotlib==1.5.1 Except for nose and kwant, I validated functionality of all packages within the Jupyter notebook. I validated that nose is operable from a shell. The surprising thing to me is that tinyarray worked. After executing jupyter notebook --matplotlib=inline from my kwant directory, I execute "import kwant". I receive the following output: --------------------------------------------------------------------------- ImportError Traceback (most recent call last) <ipython-input-1-2e77c8a8f09d> in <module>() ----> 1 import kwant C:\Users\Brendan\AppData\Local\Enthought\Canopy\User\lib\site- packages\kwant\__init__.py in <module>() 30 31 for module in ['system', 'builder', 'lattice', 'solvers', 'digest', 'rmt']: ---> 32 exec 'from . import {0}'.format(module) 33 __all__.append(module) 34 <string> in <module>() C:\Users\Brendan\AppData\Local\Enthought\Canopy\User\lib\site- packages\kwant\lattice.py in <module>() 17 import tinyarray as ta 18 from . import builder ---> 19 from .linalg import lll 20 from ._common import ensure_isinstance 21 C:\Users\Brendan\AppData\Local\Enthought\Canopy\User\lib\site- packages\kwant\linalg\__init__.py in <module>() 8 9 __all__ = ['lapack'] ---> 10 from . import lapack 11 12 # Merge the public interface of the other submodules. ImportError: DLL load failed: The specified module could not be found. I did check the site-package and compare it to the github version. I couldn't find an issue. Thanks for your help and best regards. Brendan McDougall PS: in the event that a complete package list is useful, I append here. -registry-path==1.0 appinst==2.1.5 apptools==4.3.0 atom==0.3.9 backports-abc==0.4 backports.ssl-match-hostname==3.2a3 Canopy==1.6.1 canopy-dashboard==0.4.2 canopy-packman-plugin==0.1.3 canopy-platform==0.8.0b1 CanopyDebugger==0.1.2.dev0 casuarius==1.1 certifi==2015.11.20.1 chaco==4.5.0 click==4.0 cloud==2.4.6 configobj==5.0.6 cycler==0.9.0 decorator==4.0.4 distribute-remove==1.0.0 Django==1.9.1 docutils==0.12 enable==4.5.1 enaml==0.9.8 enapp==1.0.0 enclosure==0.2 encore==0.6.0 enstaller==4.8.10 envisage==4.4.0 esky==0.9.8 etsproxy==0.1.2 Examples==7.3 faulthandler==2.4 feedparser==5.2.0 futures==2.2.0 grits-client==0.1 hatcher==0.8.7 idle==2.7.3 ipykernel==4.2.0 ipyparallel==4.1.0 ipython==4.0.0 ipython-genutils==0.1.0 ipython4==4.0.1 ipywidgets==4.1.1 jigna==0.9.5 Jinja2==2.8 jsonpickle==0.4.0 jsonschema==2.4.0 jupyter==1.0.0 jupyter-client==4.1.1 jupyter-console==4.0.3 jupyter-core==4.0.6 kernmagic==0.2.0 keyring==4.0 kiwisolver==0.1.3 kwant==1.1.1 libsodium==1.0.3 MarkupSafe==0.23 matplotlib==1.5.1 mistune==0.7.1 MKL==10.3 mysqlclient==1.3.7 nbconvert==4.1.0 nbformat==4.0.1 nose==1.3.4 notebook==4.0.6 numpy==1.9.2 okonomiyaki==0.9.0 pandas==0.17.1 path.py==8.1.1 pickleshare==0.5 PIL-remove==1.0.0 pillow==3.0.0 ply==3.8 psutil==2.2.1 pyaudio==0.2.4 pycrypto==2.6.1 pyface==5.0.0 pyflakes==0.4.5 pyglet==1.1.4 Pygments==2.0.2 pyparsing==2.0.3 pyreadline==2.1 PySide==1.2.2 python-dateutil==2.4.2 PythonDoc==2.7.3 pytz==2015.7 pywin32==219.0.0 PyYAML==3.11 pyzmq==15.1.0 qtconsole==4.1.1 requests==2.9.0 scipy==0.16.1 seaborn==0.6.0 shiboken==1.2.2 simplegeneric==0.8.1 singledispatch==3.4.0.3 six==1.10.0 ssl-match-hostname==3.4.0.2 supplement==0.5.dev0 sympy==0.7.6.1 tabulate==0.7.3 tinyarray==1.1.0 tornado==4.3 traitlets==4.0.0 traits==4.5.0 traitsui==5.0.0 virtualenv==13.1.2 wxPython==3.0.2.0 zeromq==4.1.3 zipfile2==0.0.8