Thanks Ben. I share this here in case someone will face the same problem in the future the problem: when importing py_pjsua you get an error of SymbolNotFound Last night when I ran "otool -L pypjsua.so" I got: py_pjsua.so: /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 88.3.6) /usr/lib/libssl.0.9.7.dylib (compatibility version 0.9.7, current version 0.9.7) /usr/lib/libcrypto.0.9.7.dylib (compatibility version 0.9.7, current version 0.9.7) this morning I ran: "sudo port install gcc42", then, I recreate a local copy from the latest revision and everything works fine. running now "otool -L pypjsua.so" yields: py_pjsua.so: /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 88.3.6) /usr/lib/libssl.0.9.7.dylib (compatibility version 0.9.7, current version 0.9.7) /usr/lib/libcrypto.0.9.7.dylib (compatibility version 0.9.7, current version 0.9.7) /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 368.28.0) /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox (compatibility version 1.0.0, current version 1.0.0) Notice the additional CoreFoundation (CF) and the AudioToolbox which were missing the error in discussion: >* Python 2.5.1 (r251:54863, Jan 17 2008, 19:35:17) *>* [GCC 4.0.1 (Apple Inc. build 5465)] on darwin *>* Type "help", "copyright", "credits" or "license" for more information. *>* >>> import py_pjsua *>* Traceback (most recent call last): *>* File "<stdin>", line 1, in <module> *>* ImportError: *>* dlopen(/Library/Python/2.5/site-packages/py_pjsua.so, 2): *>* Symbol not found: ___CFConstantStringClassReference *>* Referenced from: *>* /Library/Python/2.5/site-packages/py_pjsua.so *>* Expected in: dynamic lookup * -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080330/c2280d96/attachment.html