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Yuzu Error Codes List with Meanings (Complete Reference Guide)

By mukul saini 5 min read
Yuzu Error Codes Guide (2026): Meanings, Causes & Working Fixes
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Setting up an emulator like Yuzu often requires careful configuration. Even when everything seems correctly set up, you may encounter a series of unfamiliar error codes when launching a game. These codes can be confusing at first, but understanding them makes it much easier to get back to playing without unnecessary trial and error.

In Yuzu, each error code is a direct system message that indicates what went wrong during the game loading process.

This guide focuses on explaining those error codes in a clear and structured way, helping you understand their meaning and the underlying cause.

By learning how to interpret these codes, you can quickly identify issues related to keys, game files, or compatibility and handle them more effectively.

What is an Error Code?

An error code is a combination of numbers or alphanumeric characters generated by software when something goes wrong. In simple terms, it acts as a reference that helps identify the exact issue within a program.

In the case of Yuzu, these codes are designed to point to specific problems—such as missing keys, corrupted files, or unsupported formats. Instead of showing a vague message, the emulator provides a precise code that helps both users and developers understand the root cause.

This system makes troubleshooting more efficient. When users encounter an error code, they can look it up or report it, allowing developers or support resources to quickly determine what caused the issue and how it can be addressed.

Yuzu Key Error Codes

Instead of guessing, you can use these codes as a direct reference to fix the problem.

Error CodeMeaning
0008-000CProduction Key file is missing
0008-000DHeader Key is missing
0008-000EIncorrect Header Key is used
0008-0011Title Key is missing
0008-0012Title KEK is missing
0008-0014KeyAreaKey is missing
0008-0015Incorrect KeyAreaKey is used
0008-0016TitleKey or TitleKEK is missing
0008-0018NCA file not found

Common Error Codes

These are frequently encountered errors during normal emulator usage.

Error CodeMeaning
0008-001C (ErrorNullFile)File is empty, corrupted, or contains no data
0008-001D (ErrorMissingNPDM)main.npdm file is missing
0008-001E (Error32BitISA)Unsupported 32-bit architecture
0008-0029 (ErrorNAXInconvertibleToNCA)File is not a valid game (likely a save file)
0008-002A (ErrorBadNAXFilePath)Incorrect file path or structure
0008-0039 (ErrorMissingBKTRBaseRomFS)Game update was launched incorrectly

Corruption Error Codes

These errors usually indicate problems with game dumps or file integrity.

Error CodeMeaning
0008-0004 (ErrorBadNPDMHeader)Invalid NPDM header
0008-0005 (ErrorBadACIDHeader)Invalid ACID header
0008-0006 (ErrorBadACIHeader)Invalid ACI header
0008-0007 (ErrorBadFileAccessControl)File access control issue
0008-0008 (ErrorBadFileAccessHeader)Invalid file access header
0008-0009 (ErrorBadPFSHeader)Invalid PFS header
0008-000A (ErrorIncorrectPFSFileSize)Incorrect PFS file size
0008-0013 (ErrorInvalidRightsID)Invalid Rights ID
0008-0017 (ErrorXCIMissingProgramNCA)Missing Program NCA (keys issue possible)
0008-0019 (ErrorNoExeFS)Missing executable file system
0008-001A (ErrorBadXCIHeader)Invalid XCI header
0008-001B (ErrorXCIMissingPartition)Missing XCI partition
0008-001F (ErrorNoRomFS)Missing RomFS data
0008-0020 (ErrorIncorrectELFFileSize)Incorrect ELF file size
0008-0021 (ErrorLoadingNRO)Error loading NRO file
0008-0022 (ErrorNoIcon)Game icon missing
0008-0023 (ErrorNoControl)Missing control data
0008-0024 (ErrorBadNAXHeader)Invalid NAX header
0008-0025 (ErrorIncorrectNaxFileSize)Incorrect NAX file size
0008-0031 (ErrorNSPMissingProgramNCA)NSP missing Program NCA
0008-0032 (ErrorBadBKTRHeader)Invalid BKTR header

General Error Codes

These are less common and usually related to unsupported formats.

Error CodeMeaning
0008-000F (ErrorNCA2)Unsupported or invalid NCA format
0008-0010 (ErrorNCA0)Unsupported or invalid NCA format

More Key Error Codes

These appear when advanced key components are missing.

Error CodeMeaning
0008-002B (ErrorMissingSDSeed)SD Seed is missing
0008-002C (ErrorMissingSDKEKSource)SDKEK Source is missing
0008-002D (ErrorMissingAESKEKGenerationSource)AES KEK generation source missing
0008-002E (ErrorMissingAESKeyGenerationSource)AES key generation source missing
0008-002F (ErrorMissingSDSaveKeySource)SDSaveKeySource is missing
0008-0030 (ErrorMissingSDNCAKeySource)SD NCA Key Source missing or incorrect

Internal Error Codes

These are rare and mostly used for internal or development-level debugging.

Error CodeMeaning
0008-0000 (Success)Operation completed successfully
0008-0001 (ErrorAlreadyLoaded)File is already loaded
0008-0002 (ErrorNotImplemented)Feature not fully implemented
0008-0003 (ErrorNotInitialized)System not initialized
0008-0026 (ErrorNAXKeyHMACFailed)NAX key HMAC validation failed
0008-0027 (ErrorNAXValidationHMACFailed)NAX validation HMAC failed
0008-0028 (ErrorNAXKeyDerivationFailed)NAX key derivation failed
0008-0033 (ErrorBKTRSubsectionNotAfterRelocation)BKTR subsection relocation issue
0008-0034 (ErrorBKTRSubsectionNotAtEnd)BKTR subsection not at end
0008-0035 (ErrorBadRelocationBlock)Corrupted relocation block
0008-0036 (ErrorBadSubsectionBlock)Invalid subsection block
0008-0037 (ErrorBadRelocationBuckets)Invalid relocation bucket
0008-0038 (ErrorBadSubsectionBuckets)Invalid subsection bucket

Troubleshooting Loader Errors

Error CodesWhat They Mean
0008-0000Success
0008-0001ErrorAlreadyLoaded
This is an internal error and should be reported to the devs immediately.
0008-0002ErrorNotImplemented
0008-0003ErrorNotInitialized
0008-0004ErrorBadNPDMHeader
0008-0005ErrorBadACIDHeader
0008-0006ErrorBadACIHeader
0008-0007ErrorBadFileAccessControl
0008-0008ErrorBadFileAccessHeader
0008-0009ErrorBadPFSHeader
0008-000AErrorIncorrectPFSFileSize
0008-000BErrorMissingHeaderKey
To read any encrypted file, you need the NCA header key. This should go in your prod.keys under header_key
0008-000CErrorIncorrectHeaderKey
0008-000DErrorNCA2
The NCA you are attempting to load is using an older format that is not currently supported. If you would like support to be added, consider filing an issue.
0008-000EErrorNCA0
The NCA you are attempting to load is using an older format that is not currently supported. If you would like support to be added, consider filing an issue.
0008-000FErrorMissingTitlekey
0008-0010ErrorMissingTitlekek
0008-0001ErrorInvalidRightsID
0008-0000ErrorMissingKeyAreaKey
0008-0000ErrorIncorrectTitlekeyOrTitlekek
0008-0000ErrorXCIMissingProgramNCA
0008-0000ErrorNCANotProgram
0008-0000ErrorNoExeFS
0008-0000ErrorBadXCIHeader
0008-0000ErrorXCIMissingPartition
0008-0000ErrorNullFile
0008-0000ErrorMissingNPDM
0008-0000Error32BitISA
The game you are trying to run uses the 32-bit ARM architecture, which is not currently supported by yuzu.
0008-0000ErrorNoRomFS
0008-0000ErrorIncorrectELFFileSize
0008-0000ErrorLoadingNRO
0008-0000ErrorNoIcon
0008-0000ErrorNoControl
0008-0000ErrorBadNAXHeader
0008-0000ErrorIncorrectNAXFileSize
0008-0000ErrorNAXKeyHMACFailed
0008-0000ErrorNAXValidationHMACFailed
0008-0000ErrorNAXKeyDerivationFailed
0008-0000ErrorNAXInconvertibleToNCA
0008-0000ErrorBadNAXFilePath
0008-0000ErrorMissingSDSeed
0008-0000ErrorMissingSDKEKSource
0008-0000ErrorMissingAESKEKGenerationSource
0008-0000ErrorMissingAESKeyGenerationSource
0008-0000ErrorMissingSDSaveKeySource
0008-0000ErrorMissingSDNCAKeySource
0008-0000ErrorNSPMissingProgramNCA
0008-0000ErrorBadBKTRHeader
0008-0000ErrorBKTRSubsectionNotAfterRelocation
0008-0000ErrorBKTRSubsectionNotAtEnd
0008-0000ErrorBadRelocationBlock
0008-0000ErrorBadSubsectionBlock
0008-0000ErrorBadRelocationBuckets
0008-0000ErrorBadSubsectionBuckets
0008-0000ErrorMissingBKTRBaseRomFS

Additional Key & Decryption Errors

Error CodeMeaning
0008-000BMissing NCA Header Key (required for decrypting game files)
0008-0013Invalid Rights ID (mismatch between game and keys)
0008-0015Incorrect KeyAreaKey used
0008-0016Missing or incorrect TitleKey/TitleKEK combination

File & Game Format Errors

Error CodeMeaning
0008-001ABad XCI Header (invalid or modified game file)
0008-001BXCI Missing Partition (often caused by trimming or modifying file)
0008-001FMissing RomFS (game data not properly structured)
0008-0020Incorrect ELF File Size (file corrupted or incomplete)
0008-0031NSP Missing Program NCA (essential game file missing)

NCA / NAX Related Errors

Error CodeMeaning
0008-0024Bad NAX Header (invalid encrypted file structure)
0008-0025Incorrect NAX File Size
0008-0029NAX cannot be converted to NCA (not a valid game file)
0008-002AInvalid NAX File Path (wrong directory structure)

Update & DLC Related Errors

Error CodeMeaning
0008-0039Missing BKTR Base RomFS (update installed incorrectly)
0008-0032Bad BKTR Header (corrupted update data)

Execution & Runtime Errors

Error CodeMeaning
0008-0019Missing ExeFS (game executable not found)
0008-0021Error Loading NRO (homebrew or app failed to load)
0008-0022No Icon Found (missing game metadata)
0008-0023No Control Data (controller config missing or broken)

Advanced / Rare Errors (Less Documented)

Error CodeMeaning
0008-0026NAX Key HMAC Failed (key validation failed)
0008-0027NAX Validation HMAC Failed
0008-0028NAX Key Derivation Failed
0008-0033BKTR Subsection Relocation Error
0008-0035Corrupted Relocation Block
0008-0037Invalid Relocation Buckets
0008-0038Invalid Subsection Buckets

Final Thoughts

Understanding Yuzu error codes makes troubleshooting much easier. Instead of trying random fixes, you can directly identify the problem—whether it’s missing keys, corrupted files, or incorrect setup.

mukul saini