Hi Khem Raj, I noti ced that whe n I chec k th e in fo p rett y-pr inte r co mman d ou tput aft er l oadi ng t he t est appl icat ion with gdb , it is show ing the expe cted beh avio r. T his mean s th at e very thin g se ems to b e fu ncti onin g co rrec tly in t hat aspe ct. Thanks for your support. bash-5.1# gdb -q test Reading symbols from test... (gdb) b 12 Breakpoint 1 at 0x234e: file test.cpp, line 12. (gdb) r Starting program: /test warning: Error disabling address space randomization: Operation not permitted [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/libthread_db.so.1". Breakpoint 1, main () at test.cpp:12 12          return 0; (gdb) p s $1 = "test" (gdb) p vi $2 = std::vector of length 3, capacity 4 = {1, 2, 3} (gdb) info pretty-printer global pretty-printers: builtin mpx_bound128 objfile /lib/libstdc++.so.6 pretty-printers: libstdc++-v6 __gnu_cxx::_Slist_iterator __gnu_cxx::__8::_Slist_iterator __gnu_cxx::__8::__normal_iterator __gnu_cxx::__8::slist __gnu_cxx::__normal_iterator __gnu_cxx::slist __gnu_debug::_Safe_iterator std::_Bit_const_iterator std::_Bit_iterator std::_Bit_reference std::_Deque_const_iterator std::_Deque_iterator std::_Fwd_list_const_iterator std::_Fwd_list_iterator std::_List_const_iterator std::_List_iterator std::_Node_handle std::_Rb_tree_const_iterator std::_Rb_tree_iterator std::__8::_Bit_const_iterator std::__8::_Bit_iterator std::__8::_Bit_reference std::__8::_Deque_const_iterator std::__8::_Deque_iterator std::__8::_Fwd_list_const_iterator std::__8::_Fwd_list_iterator std::__8::_List_const_iterator std::__8::_List_iterator std::__8::_Node_handle std::__8::_Rb_tree_const_iterator std::__8::_Rb_tree_iterator std::__8::__cxx11::__cxx1998::list std::__8::__cxx11::basic_string std::__8::__cxx11::list std::__8::__cxx1998::_Bit_const_iterator std::__8::__cxx1998::_Bit_iterator std::__8::__cxx1998::_Bit_reference std::__8::__cxx1998::_Deque_const_iterator std::__8::__cxx1998::_Deque_iterator std::__8::__cxx1998::_Fwd_list_const_iterator std::__8::__cxx1998::_Fwd_list_iterator std::__8::__cxx1998::_List_const_iterator std::__8::__cxx1998::_List_iterator std::__8::__cxx1998::bitset std::__8::__cxx1998::deque std::__8::__cxx1998::forward_list