: As mentioned, many operations don't require keys at all. Before you invest time in troubleshooting, first check if your command is actually failing. If it's just a warning, and your file is being processed correctly, you can safely ignore it. If you want to hide it, you can use the --disablekeywarns flag when running hactool .
Windows sometimes hides file extensions. Ensure your file is named exactly prod.keys and not prod.keys.txt . hactool prodkeys does not exist link
hactool -k prod.keys -x game.xci --outdir extracted_folder : As mentioned, many operations don't require keys at all
Nintendo protects its software using a complex system of hardware-based cryptographic keys. Hactool requires these exact keys to simulate a Switch console's decryption process. If you want to hide it, you can
Hactool looks for keys in specific places. If it cannot find them, you will see the "does not exist" warning.