Help: problem with PySide and libpng

Ryan Schmidt ryandesign at
Thu Jun 16 14:03:25 PDT 2011

On Jun 16, 2011, at 14:41, Thomas Haymore wrote:

>  dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
>  /site-packages/PySide/, 2): Library not loaded:
>  /opt/local/lib/libpng12.0.dylib
>   Referenced from: /opt/local/lib/libQtGui.4.dylib
>   Reason: Incompatible library version: libQtGui.4.dylib requires version
>  45.0.0 or later, but libpng12.0.dylib provides version 44.0.0

I responded in the ticket you filed:

But now I'm curious why "libpng12.0.dylib provides version 44.0.0" -- why does libpng12.0.dylib exist at all? Where is it, and where did it come from?

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