The code assumes the <x> tag, while the input has <tagid> instead. Easily fixable by changing the regex: 
    $tag =~ m/<tagid=(\d*)([[:alpha:]]*)>/;

[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: read/write delete duplicates/sort PROBLEM! - Use of uninitialized value in sprintf by choroba
in thread read/write delete duplicates/sort PROBLEM! - Use of uninitialized value in sprintf by VladP

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