Hi all, I have a strange runtime error after installing yt-dev on Snow Leopard. Traceback (most recent call last): File "/Users/jzuhone/Source/yt-i386/bin/iyt", line 7, in <module> execfile(__file__) File "/Users/jzuhone/Source/yt-i386/src/yt-hg/scripts/iyt", line 3, in <module> from yt.mods import * File "/Users/jzuhone/Source/yt-i386/src/yt-hg/yt/mods.py", line 96, in <module> from yt.visualization.api import \ File "/Users/jzuhone/Source/yt-i386/src/yt-hg/yt/visualization/api.py", line 34, in <module> from plot_collection import \ File "/Users/jzuhone/Source/yt-i386/src/yt-hg/yt/visualization/plot_collection.py", line 26, in <module> from matplotlib import figure File "/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/figure.py", line 18, in <module> from axes import Axes, SubplotBase, subplot_class_factory File "/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/axes.py", line 14, in <module> import matplotlib.axis as maxis File "/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/axis.py", line 14, in <module> import matplotlib.text as mtext File "/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/text.py", line 31, in <module> from matplotlib.backend_bases import RendererBase File "/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 41, in <module> import matplotlib.textpath as textpath File "/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/textpath.py", line 9, in <module> from matplotlib.mathtext import MathTextParser File "/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/mathtext.py", line 52, in <module> import matplotlib._png as _png ImportError: dlopen(/Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/_png.so, 2): Symbol not found: _png_set_longjmp_fn Referenced from: /Users/jzuhone/Source/yt-i386/lib/python2.7/site-packages/matplotlib/_png.so Expected in: dynamic lookup I have tried the following things: 1) using the libpng (1.4.4) installed via Fink vs. the yt local copy of libpng, making sure that the environment variables were set appropriately 2) setting the environment variables CC and CXX as suggested by the script neither of these things seems to make much of a difference. Best, John ZuHone