i have a script that runs and updates a monthly csv file with data from a daily csv file what i am trying to add, is a check, that if the current days Date is in the file in column A then that means data has already been copied over from the daily file, so do nothing and exit. But if todays Date is not in column A then copy the data and append to the monthly file. what i have so far works until i try and append the data. then it always appends even if todays dat is present. 
#!/usr/local/bin/perl
#use warnings;
use strict;

use POSIX 'mktime';
use POSIX 'strftime';
my @dateParts = localtime ();
my ($day, $month, $year) = @dateParts[3 .. 5];
$year  += 1900;
$month += 1;

 open (OUTPUT, '+<', "C:\\temp\\MONTHLY.CSV") or die "Cannot open file
+ $!\n";

 
while (defined (my $line = <OUTPUT>)) {
    chomp $line;
    my ($Date) =
        split ',', $line;

    if ($Date eq "$day $month $year") {
    close OUTPUT;
        exit
        print "\ file has already been updated today";
    
    } elsif ($Date ne  "$day $month $year") {
    # it works fine until i try this
     #open (INPUT, "C:\\temp\\DAILY.CSV") or die "Cannot open file $!\
+n";
     #open (OUTPUT, '>>', "C:\\temp\\MONTHLY.CSV") or die "Cannot open
+ file $!\n";
      #<INPUT>;    
     #while (<INPUT>) { print OUTPUT; }             
    }}
    

#close INPUT;
#close OUTPUT;

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In reply to check to see if a file has todays data in it, if it has exit if not then add data by john.tm

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