(Just a small suggestion, if you can remove those line numbers first before you post your code, it will greatly benefit fellow monks, who might help you test :-) I tested with, 
hash_tapes(["t1", "pr1", "l1", "po1"],
           ["t2", "pr2", "l2", "po2"],
           ["t3", "pr3", "l3", "po3"],
           ["t1", "pr2", "l2", "po2"]);

[download]
and it seems fine for this case. It deleted t2, t3, but left t1 there. How did you test it?

In reply to Re: Hmmm... HoA help ... by pg
in thread Hmmm... HoA help ... by talwyn

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