Hi, After the actual error I got with apachetop: debian:~# apachetop -f /var/log/apache/access.log *** glibc detected *** free(): invalid pointer: 0xb7da08c8 *** Aborted I want to learn how to debug and see what went wrong. How can I learn to debug this kind of things or how can I enable some debugging for this kind of things? Thanks, .Alejandro