Since others have answered the question you asked, I thought I would answer one that you didn't.<grin/>

Often the simplest way to process more than one file is to pass those files to your script on the command line. Then you can use one of Perl's built-in features to make your life easier. In the code below, I've removed the open() call for the read file and changed your while loop.

#!/user/bin/perl

open (OUTFILE, '>> COID_LIST.txt') or die "Unable to open Write File!\
+n$!";

while (<>) {
    my $COMPANY_ID = substr $_, 260, 5;
    push @COMPANIES, {comp => $COMPANY_ID};
  }

foreach (@COMPANIES) {
    $sum{$_->{'comp'}} += $_->{'count'};
    }
#Output in %sum
use Data::Dumper;
print OUTFILE Dumper(\%sum);

close OUTFILE;

[download]

The resulting code is called with the list of files to process on the command line. The code will then process the files from the command line, one at a time until complete. This approach can simplify some problems.

G. Wade

In reply to Re: Opening multiple files in directory by gwadej
in thread Opening multiple files in directory by molson

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