Once you have diagnosed the issue, apply the fix that matches your specific failure mode.
If you are trying to decompress or convert newer games, your keys must be dumped from a Switch running a firmware version equal to or higher than the game's requirement.
Some older versions of SAK included a file named updates64.txt . Renaming a copy of this to prod.keys and placing it in the bin folder has resolved "missing keys" errors for some users. sak are the keys.dat prod.keys correct
This is a binary (non-human-readable) file. It is a legacy or alternative key storage format used by older tools (like hactool or older versions of Nut). It contains the same data as prod.keys but in a serialized, encrypted or hashed binary format.
If you are for a legitimate technical purpose (e.g., your own hardware, authorized development), you would: Once you have diagnosed the issue, apply the
When SAK throws the error , it is performing a checksum or validation routine. It has loaded the files but noticed one of three specific logical failures:
Use NXFileViewer or NSC_Builder to inspect the NSP/XCI you are trying to open. Renaming a copy of this to prod
These should be ASCII text files containing your console's unique production keys, typically dumped using a tool like Lockpick_RCM.
: The only official way to get these is by dumping them from your own hacked Switch using a tool like Lockpick_RCM . This produces a file on your SD card. Proper Placement Locate the directory within your SAK installation folder. Place your file here. Rename for Compatibility