Rosario Pingaro schrieb: Hi Rosario, In my opinion the problem is not the cronjob but the PHP-script read_ser_moni.php. In my configuration it is not executed by the cronjob directly but via a small shellscript. Maybe some lines of code will help you to debug the functions directly... regards, Philipp __________________________________________________________________ #!/bin/bash PIDFILE=/var/run/ser.pid ADMINDIR=/iptel/html/htdocs/admin/cron_job LOGFILE=/var/log/read_ser_moni.log [ -f $PIDFILE ] || exit 1 # possibly kill old hanging instances if $(ps ax | grep -q [r]ead_ser_moni.php) then for OLDPID in `ps ax | grep [r]ead_ser_moni.php | awk '{print $1}'` do kill $OLDPID; done fi if $(ps ax | awk '{ print $1 }' | grep -q "^`cat $PIDFILE`") then cd $ADMINDIR /usr/local/bin/php -q $ADMINDIR/read_ser_moni.php | cat >> $LOGFILE else exit 1 fi exit 0