You must have all parts of the archive ( .001 , .002 , .003 , etc.) in the same folder.
Do you have (e.g., .001, .002, .003) in the same folder? Ir12.7z.002
7-Zip / Discussion / Help: I'll gladly pay if you can help me You must have all parts of the archive (
If you provide the error message or confirm you have all the parts, I can give you the exact solution. Ir12.7z.002