I haven't been able to figure out how to print out the headers to see whether there are too many. There really isn't much before the method:

BEGIN {
use Log::Log4perl qw(:easy);

Log::Log4perl->easy_init(
        {
        file  => ">> /tmp/uiv2_logfile.txt",
        level => $INFO,
        },
  );

 $SIG{__DIE__} = sub {
        if($^S) {
            # We're in an eval {} and don't want to log
            # this message but catch it later
            return;
        }
        $Log::Log4perl::caller_depth++;
        LOGDIE @_;
    };
}


use strict;
use warnings;
use diagnostics;
use CGI;
use CGI::Carp 'fatalsToBrowser';
use Frontier::RPC2;
use Frontier::Responder;
use DBI;


$ENV{ORACLE_HOME} = '/vol/ora_client/product/10.2.0.2';
my $Schema = "lv";
my $conn_data="/path/to/connection_information";

open (CONNECTION_DATA, $conn_data)
        or die "Failed to open connection data file\n";
my $DBHOST = <CONNECTION_DATA>;
my $DBUSER = <CONNECTION_DATA>;
my $DBPASS = <CONNECTION_DATA>;

close (CONNECTION_DATA);

chomp ($DBHOST); 
chomp ($DBUSER);   
chomp ($DBPASS);

my $res = Frontier::Responder->new(
         methods => {
                  Get_Login =>               \&Get_Login,
                  Get_Last_Name =>           \&Get_Last_Name,
                  Get_First_Name =>          \&Get_First_Name,
                  Get_Dept_No   =>           \&Get_Dept_No,
                  Get_AltEmpNo =>            \&Get_AltEmpNo,
                  Get_Supervisor_Emp_No =>   \&Get_Supervisor_Emp_No,
                  Get_Job_Class =>           \&Get_Job_Class,
                  GetAllByLastName =>        \&GetAllByLastName,
                  GetAllByFirstName =>       \&GetAllByFirstName,
                  GetAllByFirstOrLastName => \&GetAllByFirstOrLastName
+,
                  GetAllByLogin =>           \&GetAllByLogin,
                  GetAllByDept =>            \&GetAllByDept,
                  GetAllByEmpNo =>           \&GetAllByEmpNo,
                  GetAllByDeptExtRoom =>     \&GetAllByDeptExtRoom,
                  GetAllBySupervisor =>      \&GetAllBySupervisor,
                  GetUnixContractorInfo =>   \&GetUnixContractorInfo,
                  GetManagerList     =>      \&GetManagerList,
                  GetPeopleReportingTo =>    \&GetPeopleReportingTo,
                  Get_LoginByEmpNo =>   \&Get_LoginByEmpNo
                 }
        );

print $res->answer;
[download]

: followed by each of the methods. : Any setting of headers is being done inside Frontier. And, as I said, I've tests for each of the methods, and most are working fine. For that matter, if I pass this method a different department number, it works okay. I have 2 departments in my test data - one department has 2 people in it, and the other has 27 people in it. In the live system, there's going to be departments with a couple hundred people in it! I don't see anything obvious in the method that should impact the headers. But I don't know what code is generating the headers, so I can't tell if there's something weird in the CGI environment that's influcing the code in this one case.