Hello, I am using linux gcc 4.01, boost-1.33 on an amd 64 machine. I use program_options to retrieve a string from a config file but get a crash like this when I notify(): Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 46912541228512 (LWP 12633)] 0x00002aaaab14d2eb in std::string::assign () from /usr/lib64/libstdc++.so.6 (gdb) bt #0 0x00002aaaab14d2eb in std::string::assign () from /usr/lib64/libstdc++.so.6 #1 0x0000000000427689 in boost::program_options::typed_value<std::string, char>::notify (this=0x5de300, value_store=@0x5e1a48) at value_semantic.hpp:32 #2 0x00002aaaaafa50c9 in boost::program_options::notify () from /usr/local/lib/libboost_program_options-gcc-1_33.so.1.33.0 Is there known uncompatibilities between boost/gcc4/lib64 ?? Thank you, -- Philippe Després Associate Specialist UCSF Physics Research Lab 185 Berry Street suite 350 San Francisco CA 94107 (415) 353-4501 PGP PUBLIC KEY http://itsa.ucsf.edu/~despres/publickey.txt