# No working GUI backend found for matplotlib

**URL:** <https://discourse.julialang.org/t/no-working-gui-backend-found-for-matplotlib/2479>\
**Category:** New to Julia\
**Created:** [March 5, 2017, 10:03pm UTC](https://discourse.julialang.org/t/no-working-gui-backend-found-for-matplotlib/2479 "2017-03-05T22:03:24Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [March 6, 2017, 12:06am UTC](https://discourse.julialang.org/t/no-working-gui-backend-found-for-matplotlib/2479/9 "2017-03-06T00:06:01Z")

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> [@josimar](#):
>
> ERROR: LoadError: InitError: PyError (:PyImport\_ImportModule) ImportError(“/lib64/libz.so.1: version `ZLIB\_1.2.3.4’ not found (required by /home/josimar/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/…/…/…/libpng16.so.16)”,)

See [error loading ZLIB (wrong libz library being linked) · Issue #151 · JuliaPy/PyPlot.jl · GitHub](https://github.com/JuliaPy/PyPlot.jl/issues/151) … the problem is that it is finding the wrong libz.so library

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