{"record":{"id":"613e424b437462ac","repo":"egametang/ET","slug":"the-modified-unity-il2cpp-dll-of-curversionstr-i","errorCode":null,"errorMessage":"the modified Unity.IL2CPP.dll of {curVersionStr} isn't found. please install hybridclr in 2019.4.40 first, then switch to your unity version","messagePattern":"the modified Unity\\.IL2CPP\\.dll of (.+?) isn't found\\. please install hybridclr in 2019\\.4\\.40 first, then switch to your unity version","errorType":"exception","errorClass":"Exception","httpStatus":null,"severity":"error","filePath":"Packages/cn.etetet.hybridclr/Scripts/Editor/Share/Installer/InstallerController.cs","lineNumber":294,"sourceCode":"            // replace libil2cpp\n            string dstLibil2cppDir = $\"{SettingsUtil.LocalIl2CppDir}/libil2cpp\";\n            BashUtil.CopyDir($\"{libil2cppWithHybridclrSourceDir}\", dstLibil2cppDir, true);\n\n            // clean Il2cppBuildCache\n            BashUtil.RemoveDir($\"{SettingsUtil.ProjectDir}/Library/Il2cppBuildCache\", true);\n            if (version.major == 2019)\n            {\n                string curVersionStr = version.ToString();\n                string srcIl2CppDll = GetUnityIl2CppDllModifiedPath(curVersionStr);\n                if (File.Exists(srcIl2CppDll))\n                {\n                    string dstIl2CppDll = GetUnityIl2CppDllInstallLocation();\n                    File.Copy(srcIl2CppDll, dstIl2CppDll, true);\n                    Debug.Log($\"copy {srcIl2CppDll} => {dstIl2CppDll}\");\n                }\n                else\n                {\n                    throw new Exception($\"the modified Unity.IL2CPP.dll of {curVersionStr} isn't found. please install hybridclr in 2019.4.40 first, then switch to your unity version\");\n                }\n            }\n            if (HasInstalledHybridCLR())\n            {\n                WriteLocalVersion();\n                Debug.Log(\"Install Sucessfully\");\n            }\n            else\n            {\n                Debug.LogError(\"Installation failed!\");\n            }\n        }\n    }\n}\n","sourceCodeStart":276,"sourceCodeEnd":309,"githubUrl":"https://github.com/egametang/ET/blob/5cab01f7a8bee5f49f4781eebe9e2b1c6d7ebe0f/Packages/cn.etetet.hybridclr/Scripts/Editor/Share/Installer/InstallerController.cs#L276-L309","documentation":"Thrown during RunInitLocalIl2CppData on Unity 2019.x when the pre-modified Unity.IL2CPP.dll for the exact version string cannot be found on disk. Unity 2019 requires a patched IL2CPP executable that HybridCLR only ships for specific versions; the installer expects it to have been created by installing on 2019.4.40 first.","triggerScenarios":"version.major == 2019 and GetUnityIl2CppDllModifiedPath(curVersionStr) returns a path whose file does not exist (File.Exists is false). The modified DLL is a version-specific artifact that must be generated or downloaded separately.","commonSituations":"Using a Unity 2019 version other than 2019.4.40 without first running the installer under 2019.4.40 to produce the patched DLL; upgrading from one 2019.x patch to another without re-patching; the patched DLL was deleted or never copied into the expected location.","solutions":["Install Unity 2019.4.40 alongside your target version, run HybridCLR/Installer there to generate the modified Unity.IL2CPP.dll, then switch back to your actual 2019.x version and re-install.","Confirm the version string returned by version.ToString() matches the filename HybridCLR expects (check GetUnityIl2CppDllModifiedPath output).","If a compatible patched DLL is available from your team or CI cache, copy it to the expected source path before re-running the installer.","Consider upgrading the project to Unity 2020+ where this special-case patching is no longer required."],"exampleFix":null,"handlingStrategy":"validation","validationCode":"// For Unity 2019.x, check the patched DLL exists before installing\nif (Application.unityVersion.StartsWith(\"2019\"))\n{\n    var version = new Installer.UnityVersion(Application.unityVersion);\n    string dllPath = GetUnityIl2CppDllModifiedPath(version.ToString());\n    if (!File.Exists(dllPath))\n        Debug.LogError(\"Patched IL2CPP.dll missing at \" + dllPath + \". Install on 2019.4.40 first.\");\n}","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Document the 2019.4.40 prerequisite for all team members using 2019.x.","Upgrade to Unity 2020+ to avoid this version-specific patching entirely.","Cache the generated patched DLL in version control or artifact storage for reproducible installs."],"tags":["hybridclr","installer","unity-2019","version-specific"],"backgroundTag":null,"analyzedSha":"5cab01f7a8bee5f49f4781eebe9e2b1c6d7ebe0f","analyzedAt":"2026-08-13T21:10:40.377Z","schemaVersion":2},"datasetVersion":"2026-08-14T00:17:13.853Z"}