my %Ren2Dol = (
        rrv193\d{4}cm => "RNF191",
        );
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Having 'special' bits in there will keep autoquoting from work. Try manually quoting the key.

'rrv193\d{4}cm' => "RNF191",
[download]

(that may not be the problem you're hitting, but it's certainly a problem)