{"record":{"id":"38c55d03a28533a5","repo":"wailsapp/wails","slug":"coinitializeex-failed-with-e-unexpected","errorCode":null,"errorMessage":"CoInitializeEx failed with E_UNEXPECTED","messagePattern":"CoInitializeEx failed with E_UNEXPECTED","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"v3/pkg/w32/ole32.go","lineNumber":40,"sourceCode":"\tprocCoUninitialize        = modole32.NewProc(\"CoUninitialize\")\n\tprocCoCreateInstance      = modole32.NewProc(\"CoCreateInstance\")\n\tprocCreateStreamOnHGlobal = modole32.NewProc(\"CreateStreamOnHGlobal\")\n\tprocRegisterDragDrop      = modole32.NewProc(\"RegisterDragDrop\")\n\tprocRevokeDragDrop        = modole32.NewProc(\"RevokeDragDrop\")\n)\n\nfunc CoInitializeEx(coInit uintptr) HRESULT {\n\tret, _, _ := procCoInitializeEx.Call(\n\t\t0,\n\t\tcoInit)\n\n\tswitch uint32(ret) {\n\tcase E_INVALIDARG:\n\t\tpanic(\"CoInitializeEx failed with E_INVALIDARG\")\n\tcase E_OUTOFMEMORY:\n\t\tpanic(\"CoInitializeEx failed with E_OUTOFMEMORY\")\n\tcase E_UNEXPECTED:\n\t\tpanic(\"CoInitializeEx failed with E_UNEXPECTED\")\n\t}\n\n\treturn HRESULT(ret)\n}\n\nfunc CoInitialize() {\n\tprocCoInitialize.Call(0)\n}\n\nfunc CoUninitialize() {\n\tprocCoUninitialize.Call()\n}\n\nfunc CoCreateInstance(clsid *syscall.GUID, dwClsContext uintptr, riid *syscall.GUID, ppv uintptr) HRESULT {\n\tret, _, _ := procCoCreateInstance.Call(\n\t\tuintptr(unsafe.Pointer(clsid)),\n\t\t0,\n\t\tuintptr(dwClsContext),","sourceCodeStart":22,"sourceCodeEnd":58,"githubUrl":"https://github.com/wailsapp/wails/blob/0e754b1b40ba9044c2a1460e23b7c3de20fc5cf3/v3/pkg/w32/ole32.go#L22-L58","documentation":"Error \"CoInitializeEx failed with E_UNEXPECTED\" thrown in wailsapp/wails.","triggerScenarios":"Occurs when CoInitializeEx returns E_UNEXPECTED, indicating a catastrophic COM failure during initialization.","commonSituations":"See trigger scenarios.","solutions":["Treat E_UNEXPECTED from CoInitializeEx as a fatal, non-recoverable initialization error; check for mismatched CoUninitialize calls or a corrupted COM state on the thread.","Ensure CoInitializeEx is called on the same thread that will use COM and is paired with CoUninitialize when done."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"0e754b1b40ba9044c2a1460e23b7c3de20fc5cf3","analyzedAt":"2026-08-15T14:17:36.034Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}