Here are the commands related to error demon in AIX
To stop logging run the below command
#/usr/lib/errstop
To get rid of that log.
# rm /var/adm/ras/errlog
To restart the daemon, thus creating a new error log
# /usr/lib/errdemon
To determine the path to your system’s error log file, run the following command:
# /usr/lib/errdemon -l
Ref.:
http://unixadminguide.blogspot.com/2012/07/stopping-and-restarting-errdemon-in-aix.html