[ferret_users] library problem pyferret install

[Marco van Hulten <Marco.Hulten@xxxxxx>]

Hello,

In installed PyFerret, following
http://ferret.pmel.noaa.gov/Ferret/documentation/pyferret/build-install
I get an error concerning libpng:


$ pyferret -version
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/mhu027/installed/pyferret/lib/python2.7/site-packages/pyferret/__init__.py", line 44, in <module>
    from pyferret import libpyferret
ImportError: libpng15.so.15: cannot open shared object file: No such file or directory


I am using Ubuntu 16.04, which only provides libpng12 and libpng16.

Maybe PyFerret could be more lenient and check for libpng>=15 (or
whatever is minimally needed)?

- Marco

-- 
Geophysical Institute, University of Bergen.
Bjerknes Centre for Climate Research.  Uni Research Climate.
P.O. Box 7803, 5020 Bergen, Norway
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Www: http://www.uib.no/personer/Marco.van.Hulten

"It can scarcely be denied that the supreme goal of all theory is to
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without having to surrender the adequate representation of a single
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