Hi, I've tried to use boost on MacOS X but encouter strange problems at compilation's time. I wish to use the uBlas library so I've insert this code in an header file. #include <boost/numeric/ublas/matrix.hpp> #include <boost/numeric/ublas/io.hpp> When I try to compile I obtain those errors: /usr/include/c++/4.0.0/complex:131 error: expected unqualified-id before 'double' /usr/include/c++/4.0.0/complex:131 error: abstract declarator '_Tp&' used as declaration ... ... (149 more) I've installed the library using 'apt-get' 'apt-cache search boost' give me that boost-jam boost1.33 boost1.33-shlibs So my version off boost is 1.33 'gcc --version' display i686-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1 (Apple Computer, Inc. build 5367) I'm using a MacBook with a Core 2 Duo processor. So, do you have any idea to solve this problem ? Thanks Baptiste PS: Sorry if it's somtimes difficult to understand my words, I'm french :-) _________________________________________________________________ Personnalisez votre Messenger avec Live.com http://www.windowslive.fr/livecom/