Well it looks like your configuration for the auth module is failing. I would disable WITH_AUTH in the kamailio.cfg file to prove that ie. start with a simpler config. If that allows kamailio to start successfully then you can read the auth module documentation and look more closely at the configuration settings applicable to that module. Cheer Shane On Fri, Sep 21, 2012 at 2:35 AM, Jay chary &lt;chary(a)consultant.com <mailto:chary@consultant.com>> wrote: Hi We are trying to install Kamailio v3.3.1 on CENTOS, I followed the below urls for installation http://kb.asipto.com/asterisk:realtime:kamailio-3.0.x-asterisk-1.6.2-astdb Howeever when I try to start Kamailio by issuing kamctl start , I see the below response : INFO: Starting Kamailio : ERROR: PID file /var/run/kamailio.pid does not exist -- Kamailio start failed and I see the below in the messages log : Sep 20 10:08:49 kamailio kamailio: INFO: <core> [tcp_main.c:4829]: init_tcp: using epoll_lt as the io watch method (auto detected) Sep 20 10:08:49 kamailio /usr/local/sbin/kamailio[21533]: INFO: usrloc [hslot.c:53]: locks array size 512 Sep 20 10:08:49 kamailio /usr/local/sbin/kamailio[21533]: INFO: auth [auth_mod.c:329]: auth: qop set, but nonce-count (nc_enabled) support disabled Sep 20 10:08:52 kamailio /usr/local/sbin/kamailio[21533]: ERROR: auth_db [authdb_mod.c:244]: empty parameter 1 not allowed Sep 20 10:08:52 kamailio /usr/local/sbin/kamailio[21533]: ERROR: <core> [route.c:1216]: fixing failed (code=-1) at cfg:/usr/local/etc/kamailio//kamailio.cfg:543 Sep 20 10:08:52 kamailio /usr/local/sbin/kamailio[21533]: ERROR: <core> [route.c:1216]: fixing failed (code=-1) at cfg:/usr/local/etc/kamailio//kamailio.cfg:552 Sep 20 10:08:52 kamailio /usr/local/sbin/kamailio[21533]: ERROR: <core> [route.c:1216]: fixing failed (code=-1) at cfg:/usr/local/etc/kamailio//kamailio.cfg:585 Sep 20 10:09:30 kamailio avahi-daemon[2760]: Invalid query packet. Can u please help us ? Regards Chary _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org <mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users -- Imagination NZ Ltd Level 6 92 Queens Drive P0 Box 30449 Lower Hutt 5040 +64 4 5703870 Extn 875 +64 21 608919 (mobile) _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users