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awk -F'[()]' '/CURDEPTH/ && $4+0>200{exit 1}' test1.txt || mailx -sBut it seems the format of you file is not consistent. What is on these other lines, that do not produce a number?

<deleted>
Sorry, I did not read correctly :/
You receive a mail because $4 is not always a value, therefore, exit 1 is always executed.
If it's not too long/confidential, what does cat file...

Hi Anurag, it means OR . The command on the right hand side only gets executed if the left hand side is false. So if the script has return code 0 then there is no mail, but if it returns 1 then a...

awk -F'[()]' '/CURDEPTH/ && $2>10{exit 1}' test1.txt || mailx -s ...

depth=$(awk 'BEGIN{FS="(\(|\))"} /CURDEPTH/{if($2 > 10){print $2;p=1;exit}}END{if(!p) print 0}' test1.txt)
if [ $depth -gt 10 ]; then
mailx -s "Your Mail Subject" EMAIL_ID < mail_body_file
fi