But there's a conflict here. The game's original release wasn't for the Switch; it's on PS2, PC, etc. So creating an NSP file for it would require converting it, which isn't straightforward. Maybe the user is confused or looking for an emulator setup. Wait, but NSP is Switch-specific. Unless someone reverse-engineered the game for Switch, which is unlikely.
Another angle: Maybe they downloaded an NSP file that's a repack, and it's causing issues, hence "solid paper" as a term they don't understand. Or maybe they're referring to a PDF guide but got mixed up with the file type. Devil May Cry 4 Nsp REPACK
First, Devil May Cry 4 is a popular action game. NSP files are Nintendo Switch Pointers, used for games on emulators like Yuzu or Ryujin. A REPACK usually refers to a modified file that's smaller in size by removing unnecessary content, maybe like patches or extra files. But there's a conflict here