Hi I have a simple program running on Linux. The program implements an Active Object and uses boost::object_pool and boost::thread It cores when sending lots of messages Here is the message I get when running gdb #0 0x0804b840 in boost::simple_segregated_storage<unsigned int>::ordered_free (this=0x988b4d0, chunk=0x988bf2c) at simple_segregated_storage.hpp:46 46 { return *(static_cast<void **>(ptr)); } There are 2 threads. One thread creates Objects using boost::object_pool and enqueues them into a stl queue. The other Thread dequeues the stl queue and call MyObject::handle. static boost::object_pool<MyEvent>* _pool; Class MyObject{ Public: void handle(){ //do something _pool->destroy(this); } }; _pool = new boost::object_pool<MyObject>(1000); MyObject* obj = _pool.construct(); Queue.putq(obj); I would appreciate any thoughts/help Thank you very much -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------