If you are missing of a multi-part RAR archive, you cannot "generate" a functional replacement piece from scratch. Multi-part archives contain unique, sequential data; if one part is missing, the entire extraction will fail because the data stream is broken.
If you are trying to extract a video or audio file, you can trick the software into extracting the rest of the content. PNTHG4-G891080.part4.rar
You can force extraction to save whatever data was in the parts you do have. If you are missing of a multi-part RAR
However, you can try these workarounds to bypass the missing part or recover whatever data is left: 1. The "Fake Part" Workaround (for Media Files) You can force extraction to save whatever data
: Use a robust player like VLC Media Player to open the resulting file. VLC can often skip over the corrupted/missing section (where the fake part 4 was) and play the rest. 2. Extract with "Keep Broken Files"