Dear All, Thanks in advance for your help. kamailio installed on debain 9, sometime kamailio failed to generate any log in syslog files i.e messages/ syslog , not even generate a single line against complete dialog or generate partial logs. It's a random behaviour, as i am using syslog with the acc module, kamailio also failed to write acc logs on file which is a very critical matter for me. In a script using xinfo, xnotice, xerr function, no output from these functions in log file. Please suggest a way to fix this issue. modparam("xlog", "log_facility", "LOG_LOCAL1") version: kamailio 5.5.4 (x86_64/linux) 9d039b flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: 9d039b -- Regards M Arqum