Here's some progress regarding this issue. With LastMonth selected time period avail.cgi is reading archives in /var/log/nagios2/archives/ directory but they doesn't exist. I have the following configuration inside nagios.cfg log_rotation_method=d log_archive_path=/var/log/nagios2/archives The problem was that archives directory was owned by root.root, so I guess nagios wasn't able to create archives. I've changed the owner of archives directory to nagios.nagios, but there's one problem left: nagios.log holds data of more than one month and when log rotation starts to work it will just move it in archives under today's date :-( Is there some script which will split my nagios.log in archives correctly? After that I'll try avail.cgi, maybe that was the problem, at least on this configuration ... -- best wishes, Franjo Stipanovic