: If you get an error, it usually means one of the parts is missing or corrupted. Verify the file sizes of all parts match (except for the final part). About Principia Mathematica
The software will automatically detect and join the subsequent parts, like your .002 file, to extract the full document. Principia Mathematica.7z.002
The content you are likely extracting is one of the most influential works in the history of logic and mathematics. : If you get an error, it usually
: Ensure you have all related files in the same folder (e.g., Principia Mathematica.7z.001 , Principia Mathematica.7z.002 , etc.). Use 7-Zip or WinRAR : Right-click on the first file ( .001 ). The content you are likely extracting is one
The file extension .7z.002 indicates you have the second part of a multi-volume 7-Zip archive. To access the contents—likely a digital copy of the landmark work by Alfred North Whitehead and Bertrand Russell—you must have all parts of the split archive present. How to Extract the File
Select > Extract Here (or use similar options in WinRAR ).