Deal with records, not lines. 
local $/ = '';
while (<>) {
   next if /\A.*\nD$/m;
   print;
}

[download]
More readable, more versatile: 
local $/ = '';
while (<>) {
   chomp( my @rec = split /^/m );
   my $hdr1 = shift(@rec);
   my $hdr2 = shift(@rec);
   my %rec = @rec;
   next if $hdr2 eq 'D';
   print;
}

[download]

In reply to Re: delete lines till by ikegami
in thread delete lines till by Anonymous Monk

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