I expect the following code to produce output to the $tee filehandle, which is IO::Tee. Why is nothing coming out ? 
use strict;
use IO::Tee;

my $email_body;
open BODY , ">", \$email_body or die "Unable to store to a var : $!\n"
+;
my $tee = IO::Tee->new (\*STDOUT,\*BODY);   # create a new tee object 
+and attach STDOUT and the email buffer to it.
$tee->autoflush(1);

my ( $check_description,$check_result,$severity_w );
my $VERSION = 10.0;
my $host = "test";
format HEADER =
____v@<<<< @<<<<<<<<<<<_______________________________________________
+______________________________________________
$VERSION, $host

 Description                                                          
+               Check Result - Status-Severity
______________________________________________________________________
+______________________________________________
.
format FAIL =
   @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @>>>>>>>>>>>>>>>>>>>>>>>>>>>
+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>  -ERROR-@>
$check_description,$check_result,$severity_w
.
format STD =
   @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @>>>>>>>>>>>>>>>>>>>>>>>>>>>
+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
$check_description,$check_result
.

select ($tee); # select the default FH
$^ = 'HEADER'; # set the top of page format
$~ = 'FAIL';

$check_description = "desc";
$check_result = "result";
$severity_w = "9";

write;

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In reply to IO::Tee and write / format by beadon

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