Try 
open (WFH1, '>', "${basePath}/QueryResult4.txt") or die "$!";
run "$SQLPLUS \@${basePath}/VoucherQuery4.sql $startdate", undef, \*WF
+H1;

[download]
See IPC::Run 
## Using run() instead of system():
use IPC::Run qw( run timeout );
run \@cmd, \$in, \$out, \$err, timeout( 10 ) or die "cat: $?"

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In response to your question here http://stackoverflow.com/questions/27597811/how-to-increase-efficiency-of-perl-script-which-uses-sqlplus, consider using a sub-select query 
-- input parameter
var date1 varchar2(8);
exec :date1 := &1;

--  no headers
SET PAGESIZE 0; 
 
SELECT s.SERIALNUMBER,s."STATE",s."AT",s.OPERATORID FROM sample s
WHERE SUBSTR("AT",1,8) = :date1
AND SERIALNUMBER IN 
( SELECT SERIALNUMBER 
  FROM 
  ( SELECT t.SERIALNUMBER, Count(*) 
    FROM sample t
    WHERE SUBSTR(t."AT",1,8) = :date1
    GROUP BY t.SERIALNUMBER
    HAVING Count(*) > 1
  )
)
ORDER BY s.SERIALNUMBER,s."AT";

EXIT;

[download]
poj

In reply to Re^5: How to handel sqlplus error in perl script. by poj
in thread How to handel sqlplus error in perl script. by Ankur_kuls

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