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You need to use awk variables.


awk -F"," -v v1=$ColumnCnt '{if(NF<v1) {print "Line number : "NR" has less number of columns which is a split record." }}' filename

Assuming if number of fields is less than 4 then it is a split record:

awk -F"," '{if(NF<4) {print "Line number : "NR" has less number of columns which is a split record." }}' filename


If...

try this one !
code:
i=0
while [ $i -le 4 ]
do
i=`expr $i + 1`
cp details.csv details$i.csv
done

The best way is:
cat fileA fileB > fileC

Try making a test case to get this part working:
$ cat test.txt
file_1|process_1|cnt_1
file_2|process_2|cnt_2

$ cat test.sh
#!/bin/bash
IFS='|'
while read fname Process_dt rec_cnt; do
...

Output is as you expect i.e. 06/25/2010
working:
months is assigned a string with 3 chars for each month
getting value of month in then pure mathematics (i.e. position of your input month /3...

date=$1 looks like a wrong assignment, change it to $2. And you might need to change the print's variables placements.

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