It could be a version thing (I don't have 5.6 available to test with at the moment.) Does: 

my $foo = fileno($tee);
open STDERR, ">&$foo";

[download]
work ?

/J\

In reply to Re^7: Capturing all (and I mean all) output to a file by gellyfish
in thread Capturing all (and I mean all) output to a file by flippy

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