If you are getting an error about this specific "solid piece," it usually means part13 is corrupt or missing. Because solid archives treat all parts as one stream, damage to a single part often prevents the extraction of any files that follow it in the sequence.
Open part1.rar in WinRAR , click "Tools," and then "Repair archive." This only works if the uploader included "Recovery Records." CallOfDutyInfiniteWarfare.part13.rar
In the context of multi-part RAR archives, a "solid piece" or is a special compression method where all files are treated as one continuous data stream. Important Considerations for Your File If you are getting an error about this
You must have every single part (part1, part2, ... part13, etc.) in the same folder to extract the game successfully. You cannot extract part13 individually. Important Considerations for Your File You must have
If WinRAR or 7-Zip reports a "Checksum error" or "Unexpected end of archive" specifically at part13, that individual file is likely incomplete.
Many repackers, such as those discussed on r/CrackWatch , include a .sfv or .md5 file. Use a tool like QuickSFV to check if your part13 matches the original source. Troubleshooting Steps