Comment 1 for bug 1659027

What platform and version?

.step works for me on archlinux with:
Application: pcbnew
Version: (2017-01-25 revision 456adf4b2)-master, debug build
Libraries: wxWidgets 3.0.2
           libcurl/7.52.1 OpenSSL/1.0.2j zlib/1.2.8 libpsl/0.16.1 (+libicu/58.2) libssh2/1.8.0
Platform: Linux 4.8.13-1-ARCH x86_64, 64 bit, Little endian, wxGTK
- Build Info -
wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8)
Boost: 1.62.0
Curl: 7.52.1
KiCad - Compiler: GCC 6.2.1 with C++ ABI 1010
        Settings: USE_WX_GRAPHICS_CONTEXT=OFF
                  USE_WX_OVERLAY=OFF
                  KICAD_SCRIPTING=ON
                  KICAD_SCRIPTING_MODULES=OFF
                  KICAD_SCRIPTING_WXPYTHON=ON
                  KICAD_SCRIPTING_ACTION_MENU=OFF
                  BUILD_GITHUB_PLUGIN=ON
                  KICAD_USE_SCH_IO_MANAGER=ON
                  KICAD_USE_OCE=ON