It's an inherited situation...
As I said, the Tgt box will not accept 'D' as a valid unpack format without a full re-compile of Perl, assuming the underlying system will accept it, as per the quoted perldoc

In reply to Re^2: Value packed as 'D', how to unpack not using 'D'? by chrism01
in thread Value packed as 'D', how to unpack not using 'D'? by chrism01

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