Hi I'm running my application on AIX (compiled with gcc3.2.3) and get a segmentation fault when delaring: typedef std::list<IObjectUpdateRequestInfo *> ObjectRequestStr; ObjectRequestStr mUpdateRequests; in the creation of an ObjectInstance as line #2 It does not fail on the first ObjectInstance creation. Here is the stack: Program terminated with signal 11, Segmentation fault: #0 0xd352f0f0 in std::_List_base<com_cae::rti::IObjectUpdateRequestInfo*,std::allocator<com_c ae::rti::IObjectUpdateRequestInfo*>>::_List_base(std::allocator<com_cae::rti ::IObjectUpdateRequestInfo*>const&) (this=0x202ba630, __a=@0x200517d0)at /cae/3rdparty/include/c++/3.2.3/bits/stl_list.h:263 263 _M_node->_M_next = _M_node; #1 0xd352b60c in std::list<com_cae::rti::IObjectUpdateRequestInfo*,std::allocator<com_cae::rt i::IObjectUpdateRequestInfo*>>::list(std::allocator<com_cae::rti::IObjectUpd ateRequestInfo*> const&)(this=0x202ba630, __a=@0x200517d0) at /cae/3rdparty/include/c++/3.2.3/bits/stl_list.h:361 #2 0xd3523948 in com_cae::rti::OM::ObjectInstance::ObjectInstance(com_cae::rti::OM::IObjectMg r*, com_cae::msfx::guid, unsigned long const&, char const*) (this=0x202ba608, iObjMgr=0x200bb4b0, iFederate={mID = {1098299153,215732, 11538, 174494465}}, iClass=@0x2005197c, iName=0x0) at /cae/cae1/ship/long/mrti/dev/src/OM/CaeRti_ObjectInstance.cxx:50 #3 0xd353b6c0 in com_cae::rti::OM::ObjectMgr::registerObjectInstance(unsigned long, char const*) (this=0x200bb428, iClass=41, iObjectName=0x0) at /cae/cae1/ship/long/mrti/dev/src/OM/CaeRti_ObjectMgr.cxx:466 #4 0xd353bc30 in com_cae::rti::OM::ObjectMgr::registerObjectInstance(unsigned long)(this=0x200bb428, iClass=41) at /cae/cae1/ship/long/mrti/dev/src/OM/CaeRti_ObjectMgr.cxx:484 #5 0xd353bd14 in com_cae::rti::OM::ObjectMgr::registerObjectInstance(unsigned long)(this=0x200bb49c, iClass=41) at /cae/cae1/ship/long/mrti/dev/src/OM/CaeRti_ObjectMgr.h:485 #6 0xd3869e60 in RTI::RTIambassador::registerObjectInstance(unsigned long) (this=0x0, theClass=41) at /cae/cae1/ship/long/mrti/dev/src/libCaeRti/CaeRti_RTIAmbassador.cxx:476 #7 0xd359e24c in com_cae::rti::RtiAmbStatsWrapper::registerObjectInstance(unsigned long)(this=0x200558b8, theClass=41) at /cae/cae1/ship/long/mrti/dev/src/RtiStatistic/CaeRti_RtiAmbStatsWrapper.cxx: 519 #8 0x100118ac in com_cae::rti::Object::Object(com_cae::rti::RtiAmbStatsWrapper*, int)(this=0x202ba5e8, iRti=0x200558b8, iMaxClsHandle=48) at /cae/cae1/ship/long/mrti/dev/src/SimpleFederate/CaeRti_Object.cxx:39 #9 0x10003438 in startSimpleFederate(void*) (iArg=0x2ff22728) at /cae/cae1/ship/long/mrti/dev/src/SimpleFederate/CaeRti_SimpleFederate.cxx:65 2 #10 0xd35f1d88 in com_cae::msfx::CCallback(void*) (iParam=0x20034df8) at /cae/cae1/ship/long/mrti/dev/src/SfxPort/msfx_Thread.cxx:81 #11 0xd00080cc in _pthread_body () from /usr/lib/libpthreads.a(shr_xpg5.o) Any ideas? Thanks & regards Long