: You must have every part of the sequence in the same folder (e.g., part1.rar , part2.rar , part3.rar ). If any part is missing, the extraction will fail.

: Move Resident.Evil.6.part1.rar , Resident.Evil.6.part2.rar , etc., into one single folder.

: This means you are missing one of the parts (e.g., you have Part 1 and Part 2, but the archive requires Part 3).