Dear Perl Monks:
     I am trying to write a script to do the following:
     1.  Read a list of files into an array from a file
     2.  Compare each file in the array to one another using cmp
     3.  Print the results to a file.
     This is my attempt so far...

#!/usr/bin/perl -w

#open file
open(OUTFILE, ">/media/hda3/differences.txt") or die("Unable to open file");

#read file into array
@data = <FILE>;  

#close file
close (FILE);

#Used to test if data is read into array
#print $data[2];                                      

#open file to save differences
open(FILE, "/media/hda3/differences.txt");

#loop to determine differences
for ($i=0; $i<377; $i++)
  {
  for($j=$i+1; $j<377; $j++)
     {
     $command_line = "cmp -l /media/hda3/2967test/"$data[$i]" /media/hda3/2967test/"$data[$j]"| wc -l";
     $diff_count = system $command_line;
     print OUTFILE ($data[$i], "\t", $date[$j], "\t", $diff_count, "\n");
     }   
  }

#close file
close(FILE);

These are the error msgs that I receive
Scalar found where operator expected at ./differ.pl line 23, near ""cmp -l /media/hda3/2967test/"$data"
        (Missing operator before $data?)
String found where operator expected at ./differ.pl line 23, near "]" /media/hda3/2967test/""
        (Missing operator before " /media/hda3/2967test/"?)
Scalar found where operator expected at ./differ.pl line 23, near "" /media/hda3/2967test/"$data"
        (Missing operator before $data?)
String found where operator expected at ./differ.pl line 23, near "]"| wc -l""
        (Missing operator before "| wc -l"?)
syntax error at ./differ.pl line 23, near ""cmp -l /media/hda3/2967test/"$data"
Execution of ./differ.pl aborted due to compilation errors.

     I am having a hard time debugging this.  Any ideas what I am doing wrong here?  Is there a better way to do this?  Thank you for your advice.

Sincere Seeker of Perl Wisdom,

Lunchb0x