# Vtk python does not import on today's windows nightly

**URL:** <https://discourse.slicer.org/t/vtk-python-does-not-import-on-todays-windows-nightly/1868>\
**Category:** Development\
**Tags:** qt\
**Created:** [January 18, 2018, 2:05pm UTC](https://discourse.slicer.org/t/vtk-python-does-not-import-on-todays-windows-nightly/1868 "2018-01-18T14:05:43Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [January 18, 2018, 3:27pm UTC](https://discourse.slicer.org/t/vtk-python-does-not-import-on-todays-windows-nightly/1868/6 "2018-01-18T15:27:41Z")

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I can confirm the fix from Andras works. The SlicerLauncherSettings.ini file is in the bin directory and in addition to adding the line `12\path=<APPLAUNCHER_DIR>/bin/Lib/site-packages` you need to increment the last line of the section to `size=12`.

Other notes: the nightly crashes when started over remote desktop but the 4.8.1 release does not (probably the OpenGL2 issue) and I see the same [slowdown in Slice rendering that Andras reported](https://issues.slicer.org/view.php?id=4496).

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_[View the full topic](https://discourse.slicer.org/t/vtk-python-does-not-import-on-todays-windows-nightly/1868)._