: If you see a "Cannot open file as archive" error, the header may be damaged. You can try opening it in a hex editor to verify the start and end headers.
: You must have all related files (e.g., HL_001_2.7z.001 , .002 , etc.) in the same folder. HL_001_2.7z
: If extraction fails halfway, you are likely missing one of the numbered parts. : If you see a "Cannot open file