[OpenSER-Users] memory error sems with openser

Hello, I user openser with sems , and each 2 week a memory error. the problem is that I don't have more trafic that usualy. Sep 13 13:39:46 dns2 Sems[1254]: Debug: (AmUtils.cpp)(write_to_socket)(614): write to unix socket: completed Sep 13 13:39:46 dns2 ./openser[3673]: t_uac: short of cell shmem Sep 13 13:39:46 dns2 Sems[1254]: Debug: (AmEventQueue.cpp)(processEvents)(71): event processed Sep 13 13:39:46 dns2 ./openser[3673]: unix_server_loop: Command 't_uac_dlg' failed with return value -1 Sep 13 13:39:46 dns2 Sems[1254]: Debug: (AmSession.cpp)(run)(292): 2D9B7F95-46E9218200068CF4-97601B30(a)212.203.123.82 dlg.getUACTransPending() = 1 Sep 13 13:39:46 dns2 Sems[1254]: Debug: (AmServer.cpp)(run)(93): revents = 1 Sep 13 13:39:46 dns2 Sems[1254]: Debug: (AmCtrlInterface.cpp)(cacheMsg)(186): recv-ed: <500 Server error occurred (2/FIFO/UAC> Sep 13 13:39:46 dns2 Sems[1254]: Debug: (AmInterfaceHandler.cpp)(handleRequest)(187): response from Ser: 500 Server error occurred (2/FIFO/UAC Sep 13 13:39:46 dns2 Sems[1254]: Error: (AmInterfaceHandler.cpp)(handleRequest)(214): reply is missing headers: <500 Server error occurred (2/FIFO/UAC> Sep 13 13:39:46 dns2 Sems[1254]: Debug: (AmServer.cpp)(run)(93): revents = 0 Sep 13 13:40:15 dns2 ./openser[3794]: ERROR:tm:t_should_relay_response: pick_branch failed (lowest==-1) for code 408 Sep 13 13:40:19 dns2 Sems[1254]: Debug: (UserTimer.cpp)(checkTimers)(97): Timeout Event could not be posted, session does not exist any more. Sep 13 13:43:19 dns2 ./openser[3764]: ERROR: new_t: out of mem: Sep 13 13:43:19 dns2 ./openser[3764]: ERROR: t_newtran: new_t failed Sep 13 13:44:23 dns2 ./openser[3748]: ERROR: new_t: out of mem: Sep 13 13:44:23 dns2 ./openser[3748]: ERROR: t_newtran: new_t failed Sep 13 13:44:28 dns2 ./openser[3781]: ERROR: new_t: out of mem: Sep 13 13:44:28 dns2 ./openser[3781]: ERROR: t_newtran: new_t failed Sep 13 13:44:47 dns2 ./openser[3765]: ERROR: new_t: out of mem: Sep 13 13:44:47 dns2 ./openser[3765]: ERROR: t_newtran: new_t failed Sep 13 13:45:09 dns2 ./openser[3747]: ERROR: new_t: out of mem: Sep 13 13:45:09 dns2 ./openser[3747]: ERROR: t_newtran: new_t failed