General :: Squid Service Is Dead - Error "no Running Copy"

i have squid running in my network the problem i am facing is that once a week the squid service is dead, i checked the log files bu could not figure out what the problem is it gives me the error squid dead but pid file exist squid error no running copy i have written a script that just moves the compressed log files from the /var/log/squid files to /media/usbdisk the script is as follows i suspect that this problem arises because of the script coz the script runs every week and the next day i get this problem

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