I ran into a similar issue. The problem could be that you are using Date::Manip version 6 syntax, and that you are using a perl older than 5.10. In this case, only Date::Manip version 5 syntax is allowed. So the solution is to upgrade to using a newer perl, such as 5.10, or change the syntax of your code to use version 5 of Date::Manip. See the man pages such as: html/site/lib/Date/Manip/DM5.html html/site/lib/Date/Manip.html gmoore777

use DateTime qw( );

my @months = qw( ... );
my $month_lkup  = map { $months[$_] => $_+1 } 0..$#months;

my $ref_dt = DateTime->today()-subtract( days => 2 );

while (<>) {
   my ($date) = /^(?:\S+\s+){3}\[([^\]]*)\]/
      or next;

   my ($d,$m,$y,$H,$M,$S) = $date =~ /\w+/g;
   $m = $month_lkup{$m};

   my $dt = DateTime->new(
      year      => $y,
      month     => $m,
      day       => $d,
      hour      => $H,
      minute    => $M,
      second    => $S,
      time_zone => 'UTC',
   );

   $dt->set_time_zone('local');
   $dt->truncate( to => 'day' );

   print if $dt == $ref_dt;
}
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Untested.

#!/usr/bin/perl

use strict;
use warnings;

use Date::Manip;

my $date_manip_object = new Date::Manip::Date;

$date_manip_object->parse( '2 days ago' );
$date_manip_object->convert( 'GMT' );

my $gmt_ref = $date_manip_object->printf( '%Y%m%d') ;

while (<DATA>) {
    my $err = $date_manip_object->parse_format('.*?\\[%d/%b/%Y:%T\s+%z
+\\].*', $_);

    next if $err; # skip (?) lines that do not match the date format

    my $input_line_date = $date_manip_object->printf( '%Y%m%d') ;

    if ($input_line_date eq $gmt_ref) {
       print;
    }
}

__DATA__
10.1.10.178  -       -       [15/Jun/2010:23:30:34    +0000]      -
10.1.10.178  -       -       [16/Jun/2010:23:30:34    +0000]      -

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Unfortunately we don't have installed this module.

Can't locate object method "new" via package "Date::Manip::Date" (perh
+aps you forgot to load "Date::Manip::Date"?)
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I am getting the error as above. Please tell me is there any other way to do this.

use Date::Manip;
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should be

use Date::Manip::Date;
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If you can, install Date::Manip from CPAN. Otherwise, try a solution with one of the modules you have installed, maybe DateTime.