Ensure you have part1.rar and any other numbered parts in the sequence. You cannot extract Part 2 by itself.
If the file is encrypted, you will need the password provided by the original uploader. P30pl3H4t3W3dd1ngHDR.yamil.part2.rar
Do you have of this file, or are you seeing a specific error message when trying to open it? Ensure you have part1