The title is the error message I find in the apache error logs.

What is especially odd is that there are two different cgi scripts that do basically the same thing, but one works and the other gives this error.

You can even check out the behaviour of the two scripts at these two URLS:

 
http://74.15.160.240:8080/cgi-bin/Aresults.cgi
http://74.15.160.240:8080/cgi-bin/calculator.cgi
[download]

The following code producs the error in the title

sub print_response {
    unless ($query->param) {
      print "<b>Results</b>";
      return;
    }
    $ticker = $query->param('ticker');
    $begin_dt = $query->param('begin_dt');
    $end_dt = $query->param('end_dt');
    
    print "<b>FIRST:<br />Ticker: $ticker<br />Start date: $begin_dt<b
+r />End date: $end_dt</b><br /><br />"; 
    
use Net::HTTP;
    
    print "<b>SECOND:<br />Ticker: $ticker<br />Start date: $begin_dt<
+br />End date: $end_dt</b>"; 
    
my $s = Net::HTTP->new(HOST => "localhost:5000");
    
    print "<b>THIRD:<br />Ticker: $ticker<br />Start date: $begin_dt<b
+r />End date: $end_dt</b>";
    
    $s->write_request(GET => "/Aresult.pl?ticker=$ticker&begin_dt=$beg
+in_dt&end_dt=$end_dt", 'User-Agent' => "Mozilla/5.0");
    ($code,$mess, %h) = $s->read_response_headers;
    while (1) {
      my $buf;
      my $n = $s->read_entity_body($buf,1024);
      last unless $n;
      print $buf;
    }
}
[download]

But in the other cgi script, the following function works fine.

sub print_response {
    unless ($query->param) {
      print "<b>No data has been submitted</b>";
      return;
    }
    $vdate = $query->param('vdate');
    $edate = $query->param('edate');
    $ot = $query->param('ot');
    $ul = $query->param('underlying');
    $strike = $query->param('strike');
    $dy = $query->param('dividendyield');
    $rfr = $query->param('riskfreerate');
    $vol = $query->param('volatility');
use Net::HTTP;
my $s = Net::HTTP->new(Host => "localhost:5000");
#my $s = Net::HTTP->new(Host => "192.168.2.104:5000");
$s->write_request(GET => "/calc.pl?&vdate=$vdate&edate=$edate&optionty
+pe=$ot&underlying=$ul&strike=$strike&dividendyield=$dy&riskfreerate=$
+rfr&vol=$vol", 
              'User-Agent' => "Mozilla/5.0");
my ($code,$mess, %h) = $s->read_response_headers;

while (1) {
  my $buf;
  my $n = $s->read_entity_body($buf,1024);
  last unless $n;
  print $buf;
}
}
[download]

Apart from the name of the cgi scripts containing these two functions, and the details of these two functions, the scripts are mostly the same.

The scripts are on the same machine, on the same instance of Apache's httpd (the latest version build for Windows - and I use the latest version of Activestate's Perl)

What can possibly account for the difference int he behvaiour of these two functions.