{"record":{"id":"7e5f76b7a0578ae6","repo":"cefsharp/CefSharp","slug":"unable-to-locate-required-cef-cefsharp-dependencie","errorCode":null,"errorMessage":"Unable to locate required Cef/CefSharp dependencies:","messagePattern":"Unable to locate required Cef/CefSharp dependencies:","errorType":"exception","errorClass":"Exception","httpStatus":null,"severity":"critical","filePath":"CefSharp/DependencyChecker.cs","lineNumber":253,"sourceCode":"            {\n                resourcesDirPath = nativeLibPath;\n            }\n\n            var missingDependencies = CheckDependencies(true, packLoadingDisabled, managedLibPath, nativeLibPath, resourcesDirPath, browserSubProcessPath, Path.Combine(localesDirPath, locale + \".pak\"));\n\n            if (missingDependencies.Count > 0)\n            {\n                var builder = new StringBuilder();\n                builder.AppendLine(\"Unable to locate required Cef/CefSharp dependencies:\");\n\n                foreach (var missingDependency in missingDependencies)\n                {\n                    builder.AppendLine(\"Missing:\" + missingDependency);\n                }\n\n                builder.AppendLine(\"Executing Assembly Path:\" + nativeLibPath);\n\n                throw new Exception(builder.ToString());\n            }\n        }\n    }\n}\n","sourceCodeStart":235,"sourceCodeEnd":258,"githubUrl":"https://github.com/cefsharp/CefSharp/blob/16bc6e0711a4945be17e8bc4bc7ccf9469f3fdec/CefSharp/DependencyChecker.cs#L235-L258","documentation":"DependencyChecker.AssertAllDependenciesPresent enumerates all required CEF/CefSharp files (native DLLs, .pak resources, locale files, the BrowserSubProcess executable) in the executing assembly's directory. If any are missing, it builds a detailed message listing each missing file and the search path, then throws.","triggerScenarios":"Called automatically by Cef.Initialize when performDependencyCheck is true (the default), or manually. Any missing file in the checklist — libcef.dll, icudtl.dat, CefSharp.BrowserSubProcess.exe, locale .pak files, etc. — triggers the exception.","commonSituations":"Incomplete NuGet package restore. Build output directory cleaned or partially deployed. Running from a publish or clickonce output that did not include native files. Locale or resources directory path configured incorrectly.","solutions":["Read the exception message — it lists every missing file by name and the directory it searched.","Clean and rebuild the project so CefSharp.AfterBuild.targets copies all required files.","If publishing, ensure the publish profile includes all native files (set CopyLocal on the CefSharp packages or use a post-publish step).","Verify the locale setting matches available .pak files in the locales folder (default en-US)."],"exampleFix":"// before — default dependency check fires and throws\nCef.Initialize(new CefSettings());\n\n// after — explicitly check and report before init\ntry\n{\n    DependencyChecker.AssertAllDependenciesPresent(\n        resourcesDirPath: AppDomain.CurrentDomain.BaseDirectory,\n        browserSubProcessPath: Path.Combine(AppDomain.CurrentDomain.BaseDirectory, \"CefSharp.BrowserSubProcess.exe\"));\n}\ncatch (Exception ex)\n{\n    // log the full list of missing files, then fix deployment\n    Console.Error.WriteLine(ex.Message);\n    throw;\n}","handlingStrategy":"validation","validationCode":"// Run the dependency check explicitly with a clear error before Cef.Initialize\nvar baseDir = AppDomain.CurrentDomain.BaseDirectory;\ntry\n{\n    DependencyChecker.AssertAllDependenciesPresent(\n        resourcesDirPath: baseDir,\n        browserSubProcessPath: Path.Combine(baseDir, \"CefSharp.BrowserSubProcess.exe\"));\n}\ncatch (Exception ex)\n{\n    Console.Error.WriteLine(ex.Message); // lists every missing file\n    throw;\n}","typeGuard":null,"tryCatchPattern":"try\n{\n    Cef.Initialize(settings, performDependencyCheck: true);\n}\ncatch (Exception ex) when (ex.Message.Contains(\"Unable to locate required Cef/CefSharp dependencies\"))\n{\n    // The message body lists each missing file and the search path\n    Console.Error.WriteLine(ex.Message);\n    throw;\n}","preventionTips":["Always clean-rebuild after changing CefSharp package versions to let AfterBuild.targets refresh native files.","In publish/clickonce scenarios, verify all native files are included in the output.","Check locale .pak files exist for the configured locale (default en-US)."],"tags":["native-deps","dependency-check","startup","deployment"],"backgroundTag":null,"analyzedSha":"16bc6e0711a4945be17e8bc4bc7ccf9469f3fdec","analyzedAt":"2026-08-13T19:57:05.828Z","schemaVersion":2},"datasetVersion":"2026-08-14T00:17:13.853Z"}