Hello All, We are able to registered user and make calls with Kamailio-5.0.4 version but, When we are trying register with Kamailio-5.1 version P-Server is exiting, Jitsi client getting registered I mentioned the below P-server error logs. 4(5562) ERROR: <script>: REGISTER (sip:bob@koffee-ims.in (192.168.99.52:5060) to sip:bob@koffee-ims.in, 202f32922a316edc997683eee34f31b6@0:0:0:0:0:0:0:0) 4(5562) INFO: rr [rr_mod.c:443]: pv_get_route_uri_f(): No route header present. 4(5562) ERROR: ims_registrar_pcscf [save.c:342]: save_pending(): Error parsing sec-agree parameters: 4 4(5562) WARNING: ims_usrloc_pcscf [usrloc_db.c:420]: db_update_pcontact_security_temp(): not yet implemented or unknown security type 4(5562) ERROR: ims_usrloc_pcscf [udomain.c:586]: update_temp_security(): Error updating temp security for contact in DB 4(5562) ERROR: ims_registrar_pcscf [save.c:362]: save_pending(): Error updating temp security 5(5563) ERROR: <script>: REGISTER (sip:bob@koffee-ims.in ( 192.168.99.52:5060) to sip:bob@koffee-ims.in, 202f32922a316edc997683eee34f31 b6@0:0:0:0:0:0:0:0) 5(5563) INFO: rr [rr_mod.c:443]: pv_get_route_uri_f(): No route header present. 5(5563) ERROR: ims_registrar_pcscf [save.c:342]: save_pending(): Error parsing sec-agree parameters: 4 5(5563) WARNING: ims_usrloc_pcscf [usrloc_db.c:420]: db_update_pcontact_security_temp(): not yet implemented or unknown security type 5(5563) ERROR: ims_usrloc_pcscf [udomain.c:586]: update_temp_security(): Error updating temp security for contact in DB 5(5563) ERROR: ims_registrar_pcscf [save.c:362]: save_pending(): Error updating temp security 9(5567) ERROR: <script>: SUBSCRIBE (sip:bob@koffee-ims.in ( 192.168.99.52:5060) to sip:bob@koffee-ims.in, afcbb763f0f93a0352c619b5c99ae6 70@0:0:0:0:0:0:0:0) 9(5567) INFO: rr [rr_mod.c:443]: pv_get_route_uri_f(): No route header present. 9(5567) INFO: siputils [chargingvector.c:432]: sip_handle_pcv(): Generated PCV header P-Charging-Vector: icid-value=4956537F000101BF1500007900000000; icid-generated-at=192.168.99.170 8(5566) ERROR: <script>: SUBSCRIBE (sip:bob@koffee-ims.in ( 192.168.99.52:5060) to sip:bob@koffee-ims.in, 20e14c49f28938df0bca28302e95c1 f3@0:0:0:0:0:0:0:0) 8(5566) INFO: rr [rr_mod.c:443]: pv_get_route_uri_f(): No route header present. 8(5566) INFO: siputils [chargingvector.c:432]: sip_handle_pcv(): Generated PCV header P-Charging-Vector: icid-value=4956537F000101BE1500007900000000; icid-generated-at=192.168.99.170 12(5570) ERROR: <script>: OPTIONS (sip:bob@koffee-ims.in (192.168.99.52:5060) to sip:bob@koffee-ims.in, e6aa5e89244dc5c9c8d3368914df87d8@0:0:0:0:0:0:0:0) 12(5570) INFO: rr [rr_mod.c:443]: pv_get_route_uri_f(): No route header present. 12(5570) INFO: siputils [chargingvector.c:432]: sip_handle_pcv(): Generated PCV header P-Charging-Vector: icid-value=4956537F000101C21500007900000000; icid-generated-at=192.168.99.170 1(5559) ERROR: <script>: PUBLISH (sip:bob@koffee-ims.in (192.168.99.52:5060) to sip:bob@koffee-ims.in, 2a295e80bfd808d48ee4e20e9cd93869@0:0:0:0:0:0:0:0) 1(5559) INFO: rr [rr_mod.c:443]: pv_get_route_uri_f(): No route header present. 1(5559) INFO: siputils [chargingvector.c:432]: sip_handle_pcv(): Generated PCV header P-Charging-Vector: icid-value=4956537F000101B71500007900000000; icid-generated-at=192.168.99.170 11(5569) ERROR: <script>: SUBSCRIBE (sip:bob@koffee-ims.in ( 192.168.99.170:6060) to sip:bob@koffee-ims.in, 20e14c49f28938df0bca28302e95c1f3@0:0:0:0:0:0:0:0) 0(5556) ALERT: <core> [main.c:745]: handle_sigs(): child process 5621 exited by a signal 11 0(5556) ALERT: <core> [main.c:748]: handle_sigs(): core was generated 0(5556) INFO: <core> [main.c:771]: handle_sigs(): terminating due to SIGCHLD -- *Thanks,* *Prasannakumar Merugu9010028290*