Hello, I have modified a little an example doc_complex_map.cpp in order to use vector of integers which is a member (int_vector_) of structure stored as a shared map value (complex_data). Program works as expected on x86 (32bits). I get core dump on x86-64: (gdb) bt #0 0x000000000041ecfe in boost::container::vector<int, boost::interprocess::allocator<int, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index> > >::priv_push_back (this=0x7f3435ae9260, x=@0x7fff77fe9eac) at /home/bma/opt/include/boost/interprocess/containers/container/vector.hpp:1239 #1 0x000000000041ed57 in boost::container::vector<int, boost::interprocess::allocator<int, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0ul>, boost::interprocess::iset_index> > >::push_back (this=0x7f3435ae9260, x=@0x7fff77fe9eac) at /home/bma/opt/include/boost/interprocess/containers/container/vector.hpp:904 #2 0x0000000000401cf1 in operator() (this=0x7fff77fea0ee, x=@0x7f3435ae9218) at doc_complex_map.cpp:109 #3 0x0000000000401e8c in main () at doc_complex_map.cpp:146 Valgrind output is: [bma@dev2 example]$ vg ./doc_complex_map ==18738== Memcheck, a memory error detector. ==18738== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al. ==18738== Using LibVEX rev 1804, a library for dynamic binary translation. ==18738== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP. ==18738== Using valgrind-3.3.0, a dynamic binary instrumentation framework. ==18738== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al. ==18738== For more details, rerun with: -v ==18738== ==18738== Invalid write of size 4 ==18738== at 0x41ECFE: boost::container::vector<int, boost::interprocess::allocator<int, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0l>, boost::interprocess::iset_index> > >::priv_push_back(int const&) (vector.hpp:1239) ==18738== by 0x41ED56: boost::container::vector<int, boost::interprocess::allocator<int, boost::interprocess::segment_manager<char, boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void>, 0l>, boost::interprocess::iset_index> > >::push_back(int const&) (vector.hpp:904) ==18738== by 0x401CF0: main::test_struct::operator()(complex_data&) (doc_complex_map.cpp:109) ==18738== by 0x401E8B: main (doc_complex_map.cpp:146) ==18738== Address 0x104c0f989 is not stack'd, malloc'd or (recently) free'd This is on boost 1.43. I am attaching source code. Thanks for any hints. -- Bartosz Marcinkiewicz e-mail: bma@epcon.pl, bartosz.marcinkiewicz@epcon.pl EPCON Sp. z o.o. www.epcon.pl