I have successfully compiled the syslog-ng but upon starting .. syslog-ng daemon does not show up in the ps command. Running it in the debug mode.... i get the below error while i try to open a new putty terminal.. # /opt/soe/local/syslog-ng-3.3.7/sbin/syslog-ng -Fvde nanosleep() is not accurate enough to introduce minor stalls on the reader side, multi-threaded performance may be affected; Trying to open module; module='affile', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libaffile.so' Trying to open module; module='afprog', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libafprog.so' Trying to open module; module='afsocket', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libafsocket.so' Trying to open module; module='afuser', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libafuser.so' Trying to open module; module='basicfuncs', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libbasicfuncs.so' Trying to open module; module='csvparser', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libcsvparser.so' Trying to open module; module='dbparser', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libdbparser.so' Trying to open module; module='syslogformat', filename='/opt/soe/local/syslog-ng-3.3.7/lib/syslog-ng/libsyslogformat.so' Running application hooks; hook='1' Running application hooks; hook='3' syslog-ng starting up; version='3.3.7' Incoming log entry; line='<38>Feb 19 15:53:20 sshd[29953]: SSH: Server;Ltype: Kex;Remote: 20.201.140.200-62779;Enc: aes256-cbc;MAC: hmac-sha1;Comp: none' ** ** ERROR:(logsource.c:286):log_source_queue: assertion failed: (old_window_size > 0) Abort(coredump) Any suggestions on this please....