Hi! Below if small code for testing of pool_allocator. The program below is working quite good. But if I change 10`000 to 100`000 or more then program never ending. Regards. #include <list> #include <iostream> #include <algorithm> #include <iterator> #include int main() { using namespace std; //print_list(std::cout,primes::PrimesLE(10000000)); list p; for ( int i = 0; i < 10000; ++i ) p.push_back(i); //copy ( p.begin(), p.end(), ostream_iterator<int>(cout,"\n") ); //boost::singleton_pool::release_memory(); } -- |\/\/|   Seweryn Habdank-Wojewódzki \/\/