Hello Everyone, Kamailio 4.0.4 crashes for us once a few weeks, apparently in the same point: #0  st_delete_ucontact (_c=0x3a746361746e6f43) at ucontact.c:358 #1  0x00007f2c7a9b3836 in delete_ucontact (_r=0x7f2c37e1be40, _c=0x3a746361746e6f43) at urecord.c:509 #2  0x00007f2c7a373d52 in update_contacts (_m=0x7f2c7bc7e930, _r=0x7f2c37e1be40, _mode=1) at save.c:697 #3  0x00007f2c7a375782 in add_contacts (_m=0x7f2c7bc7e930, _d=0x7f2c35fbae20, _cflags=5, _uri=<value optimized out>) at save.c:800 #4  save (_m=0x7f2c7bc7e930, _d=0x7f2c35fbae20, _cflags=5, _uri=<value optimized out>) at save.c:876 #5  0x0000000000414ebf in do_action (h=0x7fff7c928790, a=0x7f2c7bb52e70, msg=0x7f2c7bc7e930) at action.c:1086 #6  0x000000000041c6e6 in run_actions (h=0x7fff7c928790, a=0x7f2c7bb52e70, msg=0x7f2c7bc7e930) at action.c:1573 #7  0x000000000041cdd4 in run_actions_safe (h=0x7fff7c92aaf0, a=<value optimized out>, msg=<value optimized out>) at action.c:1637 #8  0x00000000004be90d in rval_get_int (h=0x7fff7c92aaf0, msg=<value optimized out>, i=0x7fff7c928b8c, rv=<value optimized out>, cache=<value optimized out>) at rvalue.c:920 #9  0x00000000004c3074 in rval_expr_eval_int (h=0x7fff7c92aaf0, msg=0x7f2c7bc7e930, res=0x7fff7c928b8c, rve=0x7f2c7bb53790) at rvalue.c:1914 #10 0x00000000004c3139 in rval_expr_eval_int (h=0x7fff7c92aaf0, msg=0x7f2c7bc7e930, res=0x7fff7c928ff8, rve=0x7f2c7bb53010) at rvalue.c:1922 #11 0x0000000000415662 in do_action (h=0x7fff7c92aaf0, a=0x7f2c7bb54df0, msg=0x7f2c7bc7e930) at action.c:1050 #12 0x000000000041c6e6 in run_actions (h=0x7fff7c92aaf0, a=0x7f2c7bb32980, msg=0x7f2c7bc7e930) at action.c:1573 #13 0x00000000004174fa in do_action (h=0x7fff7c92aaf0, a=0x7f2c7bb60090, msg=0x7f2c7bc7e930) at action.c:1069 #14 0x000000000041c6e6 in run_actions (h=0x7fff7c92aaf0, a=0x7f2c7bb21c00, msg=0x7f2c7bc7e930) at action.c:1573 #15 0x00000000004174fa in do_action (h=0x7fff7c92aaf0, a=0x7f2c7bb60190, msg=0x7f2c7bc7e930) at action.c:1069 #16 0x000000000041c6e6 in run_actions (h=0x7fff7c92aaf0, a=0x7f2c7bb1a990, msg=0x7f2c7bc7e930) at action.c:1573 #17 0x00000000004174fa in do_action (h=0x7fff7c92aaf0, a=0x7f2c7bb60290, msg=0x7f2c7bc7e930) at action.c:1069 #18 0x000000000041c6e6 in run_actions (h=0x7fff7c92aaf0, a=0x7f2c7bb60290, msg=0x7f2c7bc7e930) at action.c:1573 #19 0x000000000041581a in do_action (h=0x7fff7c92aaf0, a=0x7f2c7bafbcb0, msg=0x7f2c7bc7e930) at action.c:690 #20 0x000000000041c6e6 in run_actions (h=0x7fff7c92aaf0, a=0x7f2c7bafbb10, msg=0x7f2c7bc7e930) at action.c:1573 #21 0x00000000004156bb in do_action (h=0x7fff7c92aaf0, a=0x7f2c7bafc050, msg=0x7f2c7bc7e930) at action.c:1065 #22 0x000000000041c6e6 in run_actions (h=0x7fff7c92aaf0, a=0x7f2c7badc5d0, msg=0x7f2c7bc7e930) at action.c:1573 #23 0x000000000041cd60 in run_top_route (a=0x7f2c7badc5d0, msg=0x7f2c7bc7e930, c=<value optimized out>) at action.c:1658 #24 0x000000000049f51e in receive_msg (buf=<value optimized out>, len=<value optimized out>, rcv_info=<value optimized out>) at receive.c:211 #25 0x0000000000532306 in udp_rcv_loop () at udp_server.c:557 #26 0x0000000000467a7a in main_loop () at main.c:1638 #27 0x000000000046a912 in main (argc=<value optimized out>, argv=<value optimized out>) at main.c:2566 (gdb)  flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 4MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown  compiled on 14:47:59 Dec  9 2013 with gcc 4.4.7 Output of `bt full` here: http://pastebin.com/3qY8B1eC Will upgrading to 4.0.5 solve this issue ?  Regards, Dragos