#!/usr/bin/perl -w

BEGIN{
    $ENV{SYBASE} = "/opt/sybase";
}
BEGIN{

        $ENV{LD_LIBRARY_PATH} = "/usr/local/samba/lib";
        print "env is $ENV{LD_LIBRARY_PATH}\n" if $DEBUG;
}
BEGIN{

        $ENV{LIBPATH} = "/usr/local/samba/lib";
        print "env is $ENV{LIBPATH}\n" if $DEBUG;
}

#Modules
use IO::Socket::INET;
use Sybase::CTlib;
use Date::Calc ":all";
use Carp;
use Crypt::CBC; 
      
#Declare Variables
my $DEBUG=0; #Set to one for comments
my $OrderId;
my $HashOrderId;
my $msg;
my $key = "integration";
my $iv = pack("H16", "0123456789ABCDEF");
my $web_address = "http://webpinspdfdev/powerchartaccess/ViewPDF?o="; 
+#Will need to be changed for production
my $ciphertext;
my $cipher;
my $DIR;
my $idxcount = 0;
my $out_file = "/opt/impact55/Hash_PDF/out_file_$idxcount.dat";

#Source Code

$BASEPATH = "/opt/impact55/Hash_PDF";
$APP = $ARGV[0];

problem ("You must supply one APP as an argument!") 
unless ($#ARGV == 0);

if($APP eq "PFT"){$DIR = "PFT"} #Set file directory

my @transactions = glob("$BASEPATH/$DIR/PDF_${APP}_*.tmp"); #put all f
+iles in array
print "transactions: @transactions\n" if $DEBUG;

if($APP eq "PFT"){

    #for each file in array
    foreach my $in_file (@transactions){

        print "in_file: $in_file\n" if $DEBUG;

        open(FH,$in_file);
        @lines = <FH>;
        close(FH);
        
        $idxcount++;
        
        #set encryption
        $cipher = Crypt::CBC->new( -key    => $key,
                           -cipher => 'Crypt::Blowfish',
                           -header => 'none',
                           -iv => $iv);
                                                   

            #Cycle through transaction
            foreach my $line (@lines) {
        
                #Pull individual segments
                my($MSH,$PID,$ORC,$OBR,$OrderId) =
               $line =~ m{(MSH\|.*)\r #MSH segment
                               (PID\|.*)\r #PID Segment
                               (ORC\|.*)\r #ORC Segment
                               (OBR\|.*)\r #OBR Segment
                               OrderId\:(\w+\_\d+)\r}smx; #Order Id to
+ be hashed
                               $OrderId = $OrderId;
                               
                               print "MSH: $MSH\n" if $DEBUG;
                               print "PID: $PID\n" if $DEBUG;
                               print "ORC: $ORC\n" if $DEBUG;
                             print "OBR: $OBR\n" if $DEBUG;
           
                    #Encypt Order Id
                    $ciphertext = $cipher->encrypt_hex($OrderId); 
                    print "Crypted Order Id: $ciphertext\n" if $DEBUG;
                
                    #Build OBX segment
                    my $OBX = "OBX|1|RP|100.214||";
                    $OBX .= $web_address;
                    $OBX .= $ciphertext;
                    $OBX .= "||||||||||";
                    print "OBX: $OBX\n" if $DEBUG;
                    
                    #Build Message
                    $msg = sprintf "\013";
                    $msg .= sprintf "$MSH\015";
                    $msg .= sprintf "$PID\r";
                    $msg .= sprintf "$ORC\015";
                    $msg .= sprintf "$OBR\015";
                    $msg .= sprintf "$OBX\034\015";
                    print "MSG: $msg\n" if $DEBUG;
                    
                    #Output
                    if($DEBUG){
                    open(my $FHOUT,">$out_file");
                    print $FHOUT $msg;
                    close($FHOUT);
                    }
                    else{
                        #Create the connection
                        my $socket = IO::Socket::INET->new( 
                                Proto => 'tcp',
                                PeerHost => 'axtcnr:6540',
                                ) or die("Can't connect to axtcnr:6540
+: $!\n");
                                
                            
                        #Send transaction
                      if($msg =~ m{(\013.*\034\015)}smx){
                          print $socket $1;
                      }
                      
                      #Shutdown sending only receive
                      $socket->shutdown(1);
                      
                      #Read response
                      $socket->recv($rv,1024);
                        print "Received from Server : $rv\n";
                        


                    }
                    
            
        
            }
    }
}
[download]

You create a new connection for each file. If $1 contains the correct string, that means the server is sending the response that's meant for one connection to an entirely unrelated connection. A server bug.

PS — $sock is a socket, so you can use it with <> (e.g. local $/; <$sock>) just like you did before you switched to IO::Socket::INET.

Thank you for your help.