Hello, I first present to you my code and I will explain later : ShmString.h : #include #include #include namespace ip=boost::interprocess; typedef ip::allocator CharAllocator; class ShmString : public ip::basic_string, CharAllocator > { public: ShmString (); virtual ~ShmString (); private: /** * The segment to build the string */ static ip::managed_shared_memory* st_segment; } This class served to have some string in memory. The following Element.h used it : #include "ShmString.h" class Element { public: Element (const Element& elem); Element (const std::string dir, const std::string file, const std::string type, const std::string newpath, const std::string newfile, ip::managed_shared_memory * segment); virtual ~Element (); private: ShmString dir; ShmString file; ShmString target; ShmString type; ShmString newpath; ShmString newfile; }; I have four attributes that declare it. When I tried to define all the attributes in the constructor like this in Element.cpp : Element::Element (const string dir, const string file, const string type, const string newpath, const string newfile, ip::managed_shared_memory *segment){ try{ this->segment = segment; //test the type if(type == Request::st_rename){ this->type.assign(type.c_str()); } else{ string res = "Class Element in constructor -> The type should be : rename "; throw EventException(res.c_str(), __LINE__ ); } this->dir.assign(dir.c_str()); this->file.assign(file.c_str()); this->target.assign(""); this->newfile.assign(newfile.c_str()); this->newpath.assign(newpath.c_str()); } catch(ip::interprocess_exception &e){ ostringstream oss; const std::string what(e.what()); oss << "Class Element in constructor 3 -> "; oss << what; throw EventException(oss.str().c_str(), __LINE__ ); } } If for example "const string dir " has the size more than 10 (the capacity by default for a ShmString object), I obtained an error like this : 0x0807439f in boost::interprocess::basic_string, boost::interprocess::allocator, 0u>, boost::interprocess::iset_index> >

::assign (this=0xb6c4e274, s=0xb8af42d0 ) at /usr/local/include/boost/interprocess/containers/string.hpp:988 #3 0x08071d26 in Element (this=0xb6c4e26c, elem=@0xb7fa224c) at ..Element.cpp:22

I tried to used some other constructors be default for basic_string but it remains the same. This code only works when in the constructors the string size are below 10. Could you someone explain me why I obtain this? Do I have some faulty code? Could you provide some examples on how store string with interprocess::basic_string in share memory for a size for more than 10 characters? I will be very grateful because I am lost... Thanks you in advance Regards Samuel -- View this message in context: http://www.nabble.com/Problem-with-boost%3A%3Ainterprocess%3Abasic_string-%3... Sent from the Boost - Users mailing list archive at Nabble.com.