Hi! I have an object containing an interprocess slist (wrapped in a simple template) which I first construct outside shared memory. Then I want to push_front this object into a slist lying inside shared memory. And I get an interprocess::bad_alloc exception from the lists copy constructor. If I don't use the slist's copy ctor but something like this->assign(x.begin(), x.end()), the code runs through (the list was always empty in the test). I use gcc 4.2.4 on linux 2.6.24 (ubuntu 8.04). Boost 1.36 What am I doning wrong? Christoph Following the throwing code: #include <boost/interprocess/containers/vector.hpp> #include <boost/interprocess/containers/slist.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <boost/interprocess/managed_shared_memory.hpp> using namespace boost::interprocess; managed_shared_memory* getSegment() { static managed_shared_memory segment(create_only, "MySharedMemory", 65536); return &segment; } template<typename T> struct my_slist { typedef allocator<T, managed_shared_memory::segment_manager> ShmemAllocator; typedef slist<T, ShmemAllocator> List; my_slist() : m_list(ShmemAllocator(getSegment()->get_segment_manager())) { } void push_front(const T& obj) { m_list.push_front(obj); } List m_list; }; struct ListHolder { my_slist<int> m_slist; }; typedef my_slist<ListHolder> HolderList; int main() { shared_memory_object::remove("MySharedMemory"); HolderList *holderlist = getSegment()->construct<HolderList>("IntListHolderList")(); ListHolder asdf; holderlist->push_front(asdf); // exception boost::interprocess::bad_alloc return 0; }