Ensure you have part1.rar , part2.rar , etc., in the same folder. Use Extraction Software: Use software like 7-Zip or WinRAR.
To use this file, it must be part of a set (e.g., part1, part2, etc.) downloaded from Ziperto. How to Handle Multipart .rar Files
You will get a single .nsp file (e.g., poklegarc.nsp ).
This often means one of the parts was not downloaded completely.