Kenneth - Thanks for response. I doubt that it is issue with split. I have another simple codes which works well.

#!/usr/bin/perl -w
use strict;
use Time::Local;
my $filename = "/tmp/IN/m1.xml";
my $finaltime = &UTCtoLocal($filename);
print "$finaltime \n";

sub UTCtoLocal {

my ($filetoread) = @_;
open (INFILE, "<$filetoread") or die "$!";
my @ActTime = map {/"(.*?)"/} grep {/MessageDateTime/} (<INFILE>);
my $iso_time = join("", @ActTime);
my $expected_epoch = 1 * 60 * 60 + 1 * 60 + 1;
my ($date, $time) = split /T/ => $iso_time;
my ($year, $mon, $mday) = split /-/ => $date;

$year -= 1900;
$mon -= 1;
my ($hour, $min, $sec) = split /:/ => $time;

my $nsec = chop($sec);
my $mtime = timegm($sec, $min, $hour, $mday, $mon, $year);
return ($mtime);
}
[download]

Based on these codes i prepared another one in OP as that is my main objective.

reagarding the inputfile, i have already provided the line which has this date and keyword used in the grep command.

any further clue?

Did you try printing the value in $date on line 29? The answer is that some of the values are not what you think, because the following code works fine:

#! /usr/bin/perl
use strict;
use warnings;
use Time::Local;

my $iso_time = '2014-03-18T15:41:14Z';
my $expected_epoch = 1 * 60 * 60 + 1 * 60 + 1;
my ($date, $time) = split /T/ => $iso_time;
my ($year, $mon, $mday) = split /-/ => $date;
my $currenttime = time; # get current time from system (epoch time)
my $threshold = 900;

$year -= 1900;
$mon -= 1;
my ($hour, $min, $sec) = split /:/ => $time;

my $nsec = chop($sec);
my $mtime = timegm($sec, $min, $hour, $mday, $mon, $year);
[download]

However, without your actual input file, I'm just guessing. Adding warnings and following the advice in Basic debugging checklist will help you track down the issue. Alternatively, I could help you debug if you posted your input file, wrapped in <code> tags.

---

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ScheduleMessage SYSTEM "../schedulev2r3/dtd/schedule-xml.dtd
+">

<ScheduleMessage DtdVersion="2" DtdRelease="3">
<MessageIdentification v="8787897987897897" />
<MessageVersion v="097" />
<MessageType v="A01" />
<ProcessType v="A02" />
<ScheduleClassificationType v="A01" />
<SenderIdentification v="9090900" codingScheme="A01" />
<SenderRole v="A01" />
<ReceiverIdentification v="453543453453" codingScheme="A01" />
<ReceiverRole v="A04" />
<MessageDateTime v="2014-03-18T15:41:14Z" />
<ScheduleTimeInterval v="2014-03-13T23:00Z/2014-03-14T23:00Z" />
<ScheduleTimeSeries>
<SendersTimeSeriesIdentification v="65765675765" />
<SendersTimeSeriesVersion v="001" />
<BusinessType v="A06" />
<Product v="8716867000016" />
<ObjectAggregation v="A01" />
<InArea v="10YFRkjkjkl" codingScheme="A01" />
<OutArea v="10YCHiuiuoiu" codingScheme="A01" />
<InParty v="jkkljkljlkj" codingScheme="A01" />
<OutParty v="uiouiouoiuo" codingScheme="A01" />
<MeasurementUnit v="MAW" />
<Period>
<TimeInterval v="2014-03-13T23:00Z/2014-03-14T23:00Z" />
<Resolution v="PT15M" />
[download]

I had to change the content of file as i am not supposed to share but solving the problem is also important. Please take a look and see if you can find something. alternatively i will go threough the debug steps mentioned in link. Thanks.

my OP reference the issue which i am facing.