If the tool shows only ProgramType 1 but the filename or installer expects ProgramType 2, you have identified the problem.
Now that we've covered the causes, let's move on to the solutions. Follow these steps to troubleshoot and fix the error:
to decrypt and read the NCA (Nintendo Content Archive) files within the NSP. If your keys were dumped from an older firmware, they may not support newer games. Improper Installation (Switch Hardware)
: If you're using homebrew to manage NSP files, ensure your homebrew tools are up-to-date. Outdated tools might not handle NSP files correctly. the nsp file is missing a programtype nca upd
Since the file structure is invalid, the easiest fix is usually to delete the file and download it again from a different source or re-dump it from your cartridge/system. The file is likely corrupt or a "bad dump."
Install updates via the emulator's "Manage Title Updates" option.
On your PC, open File Explorer and navigate to the newly mounted Switch drive. Open the or NAND Install virtual folder. If the tool shows only ProgramType 1 but
In some cases, overly long filenames or special characters can cause pathing issues. Try shortening the filename to just the game title Are you encountering this error on a Steam Deck , or are you working directly with Switch hardware The NSP file is missing a Program-type NCA. : r/EmuDeck 16 Jan 2024 —
This error typically occurs when using Nintendo Switch emulators like , Ryujinx , or custom firmware tools on a hacked console. Error: The NSP file is missing a ProgramType NCA
If multiple unrelated NSPs suddenly throw this error, your SD card may have corrupted file allocation table entries. If your keys were dumped from an older
If your file came from a .rar or .zip split into parts, re-extract them using WinRAR to avoid data errors that 7-Zip sometimes encounters.
: Tools like Steam ROM Manager or EmuDeck may have mistakenly linked to the update file instead of the base game NSP.