Note that if you're storing FILEHANDLES in an array
    or other expression, you will have to use a block
    returning its value instead:

        print { $files[$i] } "stuff\n";
        print { $OK ? STDOUT : STDERR } "stuff\n";

##</code><code>##

    print { $Unique_DeviceType{$Unique_SN{$sn}->devicetype} } ...

##</code><code>##

    my $fh = $Unique_DeviceType{$Unique_SN{$sn}->devicetype};
    print $fh ...