The most common cause for this error is a broken download. Try downloading Part 10 again from the original source .
Compare the size of Part 10 to the other parts. If it’s significantly smaller (and isn’t the very last part of the set), it's likely an incomplete download. Download part10 rar
Ensure you are using the latest version of WinRAR or 7-Zip , as older versions (like UNRAR 4.10) may struggle with newer compression methods. Unpacking isn't working - NZBGet Forum The most common cause for this error is a broken download