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in reply to Re^3: Unpack Fail to Decompress String?
in thread Unpack Fail to Decompress String?

With a trailing full length, the last comes first and the first last, with those in the middle keeping their correct relative ordering
So, don't use the actual length, use length mod 4.
inputpacked
ACGT1b 00
ACGTA1b 01
ACGTAA1b 02
ACGTAAA1b 03
ACGTAAAA1b 00 00
ACGTAAAAA1b 00 01