fiddler fiddler - 1 year ago 111
C++ Question

Error with homebrew + opencv + libpng

On Mac OS Maverick I have installed OpenCV with a

brew install opencv

I created a simple program (copied from this tutorial). Compilation worked fine but when running the executable I get the following error:

dyld: Library not loaded: /usr/local/lib/libpng16.16.dylib
Referenced from: /usr/local/lib/libopencv_highgui.2.4.dylib
Reason: Incompatible library version: libopencv_highgui.2.4.dylib requires version 33.0.0 or later, but libpng16.16.dylib provides version 32.0.0
Trace/BPT trap: 5

I checked that
was properly installed via
brew install libpng
and ran a
brew upgrade
to make sure everything was up-to-date.

locate libpng16.dylib


Any idea?

Answer Source

Homebrew should ensure that you the correct dependencies install. However, it's possible that you have more than one version of libpng16 installed at different paths. Have a look in...


If you find any versions of the library in these locations then they may be causing the wrong one to be loaded when your program starts. As a quick fix you can try typing DYLD_LIBRARY_PATH=/usr/local/lib before your program name on the command line. In the longer term you may need to remove the conflicting versions altogether.