Hi There, I have a client server application in which client sends an input file to server ,server uses a tool called abc.exe on that input file, which gives an output file and sends it back to client.The name for the output file is basically output_input file.if the output file with the same name is already present then it increments the suffix at each run. I have written this code but its not working correctly.I guess there is some problem with the $abc_cmd.Can anyone tell me what I am doing wrong?

              
        # Setup some default filenames and command strings.
        my $input_file;
        my $output_file = "output.$input_file";
        my $rcv_filesize;
        my $abc_cmd;
        my $buf;
        my $error = "ACK\n";
      
       $rcv_filesize = 0;                
       my $i = 1;
       while (-e $output_file) {
      $output_file = "output.$input_file$i";
                $i++;
                }
      $abc_cmd = "abc.exe" -i $input_file -o $output_file"; 
      print $client_socket "ACK\n";


    system $abc_cmd;     # Run the command
        print "DONE\n";
        
        # Open the file for reading 
         open(INFILE, $output_file) || die "ERROR:  Could not open out
+put_file for reading!\n";
        binmode INFILE;
        {
            local $/;
            $output_data = <INFILE>;
        }
        close(INFILE);

        print "$prefix Sending $output_file to the client... ";
        $client_socket->write($output_data, length($output_data));
        
        print length($output_data), " bytes: DONE\n";
        
        $client_socket->close();
        print "$prefix Socket closed, operation completed!\n";
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