Hi all, I installed Kamailio 4.0.0 from source an tried configuration from Kamailio 3.3.2. problem is with km_append_branch function. Not starting Kamailio400: invalid configuration file! -e 0(20346) ERROR: <core> [cfg.y:3431]: cfg. parser: failed to find command km_append_branch 0(20346) : <core> [cfg.y:3570]: parse error in config file /usr/local/kamailio400/etc/kamailio/kamailio.cfg, line 2448, column 22: unknown command, missing loadmodule? ERROR: bad config file (1 errors) configuration: ------------------ mpath="/usr/local/kamailio400/lib64/kamailio/modules_k/:/usr/local/kamailio400/lib64/kamailio/modules/" loadmodule "kex.so" ... km_append_branch(); route(RELAY); exit; } ... Please advise Best regards Pavel