STRING: tac: write error

Hi

My details are as below :-

#!/bin/sh

exec 2>&1
numInQueue=`tail -n 10000 /opt/tomcat1/logs/catalina.out | tac | grep -m 1
numInQueue | cut -d' ' -f 7`

if [ $? -ne 0 ]; then
        exit 3
fi

if [ "$numInQueue" -gt 1000000 ] ; then
        echo "QUEUE CRITICAL - $numInQueue"
        exit 2
else
        echo "QUEUE OK - $numInQueue"
        exit 0
fi

# snmpwalk -On -v 2c -c local localhost nsExtendOutput1Line
*.1.3.6.1.4.1.8072.1.3.2.3.1.1.6.110.117.109.105.110.113 = STRING: tac:
write error*
.1.3.6.1.4.1.8072.1.3.2.3.1.1.7.110.117.109.102.105.108.101 = STRING: Number
of files is OK - 0
#

I get *STRING: tac: write error

*Please suggest/guide.

Thanks

Kaushal

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