.. _SectionFAQ: FAQ === * The CKIPWS crashed with error message "``Segmentation fault (core dumped)``". What should I do? One possible solution is changing your Python to 3.6.2 (Intel Corporation). .. code-block:: bash conda install python=3.6.2 -c intel * The CKIPWS throws "``what(): locale::facet::_S_create_c_locale name not valid``". What should I do? Please install locales-all. .. code-block:: console apt-get install locales-all