: Ensure you have cm2.7z.001 and any subsequent parts in the same folder. If you are missing part one, you cannot start the extraction.
: The base name must be identical. For example: cm2.7z.001 cm2.7z.002 cm2.7z.003 cm2.7z.002
: This often happens if the .002 file (or the final part) is smaller than it should be, suggesting an incomplete download. : Ensure you have cm2
: This usually means a part is missing or one of the files was corrupted during download. cm2.7z.002