| Cause | Explanation | |-------|-------------| | | Updates/DLCs are separate NSPs; they don’t contain the base game program. You must install the base game first. | | Corrupted dump | The person who dumped the NSP missed the Program NCA. | | Split NSP (multi-part) missing a part | A base game NSP can be split into parts (part1, part2); missing one part = missing program. | | Incorrect file conversion | Sometimes people convert XCI to NSP incorrectly and lose the Program NCA. | | You’re installing a “patch NSP” alone | Updates without base game won’t work. |