Hello, I get an segmentation fault from the property_tree (1_35 trunck): Program terminated with signal 11, Segmentation fault. #0 0xb7cba2ba in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string () from /usr/lib/libstdc++.so.6 (gdb) bt #0 0xb7cba2ba in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string () from /usr/lib/libstdc++.so.6 #1 0x080d4107 in pair (this=0xa44f1284, __a=@0x891acbc, __b=@0x891acc0) at /usr/include/c++/4.2/bits/stl_pair.h:85 #2 0x080d0510 in boost::property_tree::basic_ptree<std::less<std::string>, std::string, boost::property_tree::basic_path<std::string>, std::string, boost::property_tree::translator>::insert<std::_List_const_iterator<std::pair<std::string, boost::property_tree::basic_ptree<std::less<std::string>, std::string, boost::property_tree::basic_path<std::string>, std::string, boost::property_tree::translator> > > > ( this=0xa44f1318, where={_M_node = 0xa44f131c}, first={_M_node = 0x891acb4}, last={_M_node = 0x891bf80}) at /opt/boost/include/boost-1_35/boost/property_tree/detail/ptree_implementation.hpp:304 #3 0x080d0648 in basic_ptree (this=0xa44f1318, rhs=@0x891bf7c) at /opt/boost/include/boost-1_35/boost/property_tree/detail/ptree_implementation.hpp:65 Any ideas what happened - until now property_tree worked without probs!? best regards, Oliver