If you don't already have a "proper" RAR utility, you can use these highly-rated options:
If the extraction fails even with all parts present, one of the files may be . You can try using the "Repair" function within WinRAR to fix minor integrity issues. aw012.rar
: Ensure no segments have been renamed (for example, by a browser adding (1) or (2) to the end). The names must match the original sequence exactly to be recognized as a single archive. If you don't already have a "proper" RAR