Hello ! I am trying to serialize a a complex structure. One of the "variable" is a 2D Array (Cell** m_cells ) declared with pointers. I need to keep this data structure as it is. I have read some stuff about multi array with boost but found nothing to serialize my Cell** m_cells. Maybe one of you has the solution .... Note1: using boost 1.41.0, g++ and ubuntu 9.04 .... Note2: As you may understand while reading the code, I have in fact an Array2D of PointAccumulator .... (Cell = PointAccumulator) The part of code that is not correct ..... * template <class Archive> void serialize(Archive& ar, const unsigned int version){ *ar & m_xsize & m_ysize &* m_cells; }* And raising this error: wheelchair@wheelchair-laptop:~/playerstage/boostTest$ g++ -I/usr/local/include/ -L/usr/local/lib/ simple2.cpp -o simple -lboost_serialization /usr/local/include/boost/serialization/access.hpp: In static member function ‘static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_iarchive, T = PointAccumulator*]’: /usr/local/include/boost/serialization/serialization.hpp:74: instantiated from ‘void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_iarchive, T = PointAccumulator*]’ /usr/local/include/boost/serialization/serialization.hpp:133: instantiated from ‘void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::text_iarchive, T = PointAccumulator*]’ /usr/local/include/boost/archive/detail/iserializer.hpp:173: instantiated from ‘void boost::archive::detail::iserializer::load_object_data(boost::archive::detail::basic_iarchive&, void*, unsigned int) const [with Archive = boost::archive::text_iarchive, T = PointAccumulator*]’ simple2.cpp:186: instantiated from here /usr/local/include/boost/serialization/access.hpp:109: error: request for member ‘serialize’ in ‘t’, which is of non-class type ‘PointAccumulator*’ /usr/local/include/boost/serialization/access.hpp: In static member function ‘static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive, T = PointAccumulator*]’: /usr/local/include/boost/serialization/serialization.hpp:74: instantiated from ‘void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive, T = PointAccumulator*]’ /usr/local/include/boost/serialization/serialization.hpp:133: instantiated from ‘void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive, T = PointAccumulator*]’ /usr/local/include/boost/archive/detail/oserializer.hpp:139: instantiated from ‘void boost::archive::detail::oserializer::save_object_data(boost::archive::detail::basic_oarchive&, const void*) const [with Archive = boost::archive::text_oarchive, T = PointAccumulator*]’ simple2.cpp:186: instantiated from here /usr/local/include/boost/serialization/access.hpp:109: error: request for member ‘serialize’ in ‘t’, which is of non-class type ‘PointAccumulator*’ Here is the code I use for my tests: #include <iostream> #include <iterator> #include <algorithm> #include <sstream> #include <fstream> #include #include using namespace std; using namespace boost::archive; using namespace boost::serialization; /* * point * */ template <class T> struct point{ inline point():x(0),y(0) {} inline point(T _x, T _y):x(_x),y(_y){} T x, y; friend class boost::serialization::access; template <class Archive> void serialize(Archive& ar, const unsigned int version){ ar & x & y; } }; /* * PointAccumulator * */ struct PointAccumulator{ typedef point<float> FloatPoint; PointAccumulator(): acc(0,0), n(0), visits(0){} PointAccumulator(int i): acc(0,0), n(0), visits(0){assert(i==-1);} static PointAccumulator* unknown_ptr; FloatPoint acc; int n, visits; friend class boost::serialization::access; template <class Archive> void serialize(Archive& ar, const unsigned int version){ ar & n & visits & acc; } }; /* * Array2D * */ template class Array2D{ public: Array2D(int xsize=0, int ysize=0); Array2D& operator=(const Array2D &); Array2D(const Array2D &); //~Array2D(); inline Cell& cell(int x, int y); inline void print(){ cout << "Displaying array2D (x,y) --> (" << m_xsize << "," << m_ysize << ")" << endl; for(int i=0;i Array2D & Array2D::operator=(const Array2D & g){ if (debug || m_xsize!=g.m_xsize || m_ysize!=g.m_ysize){ for (int i=0; i myArr2 = loadFromFile("out.txt"); myArr2.print(); } Thanks for the help !