./sub_mon_v2: redirection error: cannot duplicate fd: Too many open files
./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: line 45: <(echo $result | awk -F"/" '{print $1,$2,$3}'): ambiguous redirect

./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: line 45: <(echo $result | awk -F"/" '{print $1,$2,$3}'): ambiguous redirect

./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: line 45: <(echo $result | awk -F"/" '{print $1,$2,$3}'): ambiguous redirect

./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: cannot make pipe for process substitution: Too many open files
./sub_mon_v2: line 45: <(echo $result | awk -F"/" '{print $1,$2,$3}'): ambiguous redirect

check ()
{
        > $low_subs

        # Following line creates the list of subnets to check (minus the exempt subnets).
        /usr/xpg4/bin/grep -vxFf <(egrep -v "#|^$" $exempt) $check_list > $final_list

        while read line
        do
                while read result
                do
                        #Read each the date for each IP address in Day Month Year variables for checking
                        read month day year < <(echo $result | awk -F"/" '{print $1,$2,$3}')

                        # if it expired in a previous year, bin it
                        if [ $year -lt $curr_year ]
                        then
                                (( total_ip = total_ip +1 ))
                        fi

                        # if it expired in a previous month, bin it.
                        if [ $year -eq $curr_year ] && [ $month -lt $curr_month ]
                        then
                                (( total_ip = total_ip +1 ))
                        fi

                        # if it expired earlier this month
                        if [ $year -eq $curr_year ] && [ $month -eq $curr_month ] && [ $day -lt $curr_day ]
                        then
                                (( total_ip = total_ip +1 ))
                        fi

                        if [ $total_ip -le 20 ]
                        then
                                echo "Subnet "$line" running low on available IP's -"$total_ip" remaining." >> $low_subs;
                        fi

        # Pass in date field of each line returned from pntadm -P (minus Free/Reserved addresses)
                done < <(pntadm -P $line | egrep -v "Client|$^|Zero|Forever" | awk '{print $5}')
    
    # Pass in list of problem subnets
        done < $final_list
}