Hi Dave thanks for your quick answer. I don't think this is an autovivification issue as I've already try the following without any success :

if(exists $ulm_keys{$h_tag} && defined $ulm_keys{$h_tag}{$h_val}){

But I will try to check with 2 exists, just in case. Thanks again for your answer.

In reply to Re^2: Hash of hash check if defined by Jup
in thread Hash of hash check if defined by Jup

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