0x04000001 unity build_error ai_generated true

IL2CPP error: BadImageFormatException: Could not resolve field token 0x04000001

ID: unity/il2cpp-bad-image-format

Also available as: JSON · Markdown · 中文
87%Fix Rate
82%Confidence
1Evidence
2024-09-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Unity 2022.3 active — — —
Unity 2023.2 active — — —
Unity 6000.0 active — — —

Root Cause

A managed assembly contains a reference to a field that does not exist in the compiled IL, often due to partial recompilation or mismatched assembly versions.

generic

中文

托管程序集包含对编译 IL 中不存在的字段的引用，通常是由于部分重新编译或程序集版本不匹配。

Official Documentation

https://docs.unity3d.com/Manual/IL2CPP-ErrorCodes.html

Workarounds

  1. 85% success Perform a full rebuild: delete the Library and Temp folders, then recompile the project from scratch. 
    Perform a full rebuild: delete the Library and Temp folders, then recompile the project from scratch.
  2. 90% success Ensure all custom DLLs are compiled with the same .NET version and API compatibility level as the project. 
    Ensure all custom DLLs are compiled with the same .NET version and API compatibility level as the project.

中文步骤

  1. Perform a full rebuild: delete the Library and Temp folders, then recompile the project from scratch.
  2. Ensure all custom DLLs are compiled with the same .NET version and API compatibility level as the project.

Dead Ends

Common approaches that don't work:

  1. 50% fail

    The issue is in the managed assemblies, not in generated data; a full rebuild is needed.

  2. 80% fail

    Code stripping removes unused code but does not affect broken metadata references.