I've inherited some Perl code. Decyphering it has prooved harder than I had imagined. I beseech my fellow brothers for help. Please consider this code:

$url = "https://www.example.com/reports/newIssues/changeParams2.jsp";
$error {newoff_entry} {url} = $url; 
$req = HTTP::Request->new(POST => $url);

$req->content_type('application/x-www-form-urlencoded');
$cjar->add_cookie_header($req);
$req->header(userid => $user); 
$req->content("userid=$user&SessionId=$sessid&language=en");
$ua->{'timeout'} = $timeout;

$t0 = new Benchmark;
$resp = $ua->send_request($req);
$t1 = new Benchmark;
$error {newoff_entry} {rt} = timediff($t1, $t0);

$cjar->extract_cookies($resp);
#$debug =  $resp->as_string();
if (($resp->as_string() =~ /RR\s+codes/i)||($resp->as_string() =~ /$ss
+l_bug/)){
        $error {newoff_entry} {rc} = 'ok'; 
}else{
        $error {newoff_entry} {rc} = 'error';
}
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There are many sections similar to the one above. Sometimes, the error below is returned instead of the expected results.

bad time value () at /usr/lib/perl5/5.8.0/Benchmark.pm line 510.
Can't call method "cpu_p" on an undefined value at /usr/lib/perl5/5.8.
+0/Benchmark.pm line 512.
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I suspect that there may be an error acquiring the web content. Perhaps I need some error checking but, I don't have enough experience with the UserAgent to understand where to begin.