I have the following code:

$printline="O*N%1d5TG%5d       ,CLS=%.8s,XXX,BAT=,                    
+                \n";

$dest_mailbox=shift(@ARGV);
$file=shift(@ARGV);
$message_class=shift(@ARGV);

# Set up a temp file as a holding file for valid lines

$rand = int(rand(10000));
$tempfile="$file" . "$rand";
print "!Creating temp file: $tempfile!\n";
while (-f $tempfile) {
  $rand = int(rand(10000));
  $tempfile="$file" . "$rand";
  }

#
# Open the input file and temporary file
#

open (FILE, "$file") or &exit_with_error("!Error opening file for read
+: $file!\n");
open (TEMP, ">>$tempfile") or &exit_with_error("!Error opening file fo
+r write: $tempfile!\n");
#
$total_lines=0;
$hort=0;
** Prints to temp file the header record  **
printf TEMP $printline,$hort, $dest_mailbox, $message_class;
** Prints to temp file the data from another file **
while (<FILE>) {
   $total_lines++;  
    chomp($_); 
    print TEMP "$_\n"; 
  $data_lines++;
  }
}
** Prints to TEMP file the trailer record.
$hort=9;
printf TEMP $printline, $hort, $dest_mailbox, $message_class;
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The whole idea behind this code is to take a file that has data records and insert header and trailer records. The data moves over just fine, but the header and trailer records have a small square box which should be a new line character but is not. The file needs to have a the data on the next line. For some reason the temp file does not like the \n on the header and trailer record.