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Use this

awk -F, '{f=sprintf("%s.txt",$3); if(f in F){ print >>f }else { print >f ; F[f]} close(f) }' file

OR like this

awk '{f=sprintf("%s.txt",$3); if(f in F){ print >>f }else { print >f...

Please rerun and post output.. change awk to /usr/xpg4/bin/awk or /usr/xpg6/bin/awk or nawk

Hi.

Similar to others, and run on Solaris specifically:
#!/usr/bin/env bash

# @(#) s1 Demonstrate sifting, collecting lines to files, awk.

# Utility functions: print-as-echo,...

This will overwrite file everytime, did you try ?

then like this .. will it?awk '{print > $3".txt"; close($3".txt")}' file

if you are not closing you will get too many Too many open files error with large input file.

tryawk '{print > $3".txt"}' filename

$ awk '{f=sprintf("%s.txt",$NF); if(f in F){ print >>f }else { print >f ; F[f]} close(f) }' file

Of course, if you have access to a 1993 or later version of the Korn shell, you can do this entirely with shell built-ins:
#!/bin/ksh
Detail_Amount_Sum=0
while read x
do ...

For a shell solution that should be faster, try something like:
{ printf "scale=2; 0"
while read i; do
printf "+%s " "$i"
done
printf "\n"
} < IFs_temp1.txt | bc

It is slow because you are running bc 9,000 times for 9,000 numbers. Transform the entire stream into something you can feed into bc directly instead -- one program instead of 9,000.

For example...