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Assertion failed, with Linking errors

I am developing a game on UE4 (version 4.22.1) for iOS. My Platform is Mac and using Xcode for coding.

 Assertion failed: Existing.Linker->ExportMap[Existing.LinkerIndex].Object==this [File:/Users/build/Build/++UE4/Sync/Engine/Source/Runtime/CoreUObject/Private/UObject/UObjectLinker.cpp] [Line: 107]
 FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x10f47035b (filename not found) [in UE4Editor-Core.dylib]
 FMacErrorOutputDevice::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x10f5b087d (filename not found) [in UE4Editor-Core.dylib]
 FOutputDevice::LogfImpl(wchar_t const*, ...) Address = 0x10f684019 (filename not found) [in UE4Editor-Core.dylib]
 FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0x10f618a53 (filename not found) [in UE4Editor-Core.dylib]
 FDebug::CheckVerifyFailedImpl(char const*, char const*, int, wchar_t const*, ...) Address = 0x10f618867 (filename not found) [in UE4Editor-Core.dylib]
 UObject::SetLinker(FLinkerLoad*, int, bool) Address = 0x11055e906 (filename not found) [in UE4Editor-CoreUObject.dylib]
 UObject::BeginDestroy() Address = 0x11043985e (filename not found) [in UE4Editor-CoreUObject.dylib]
 UObject::ConditionalBeginDestroy() Address = 0x110448dc7 (filename not found) [in UE4Editor-CoreUObject.dylib]
 UnhashUnreachableObjects(bool, float) Address = 0x1103c708a (filename not found) [in UE4Editor-CoreUObject.dylib]
 CollectGarbageInternal(EObjectFlags, bool) Address = 0x1103c955b (filename not found) [in UE4Editor-CoreUObject.dylib]
 CollectGarbage(EObjectFlags, bool) Address = 0x1103cb65f (filename not found) [in UE4Editor-CoreUObject.dylib]
 UEditorEngine::OnPreSaveWorld(unsigned int, UWorld*) Address = 0x118249fa4 (filename not found) [in UE4Editor-UnrealEd.dylib]
 UEditorEngine::Save(UPackage*, UObject*, EObjectFlags, wchar_t const*, FOutputDevice*, FLinkerLoad*, bool, bool, unsigned int, ITargetPlatform const*, FDateTime const&, bool, FArchiveDiffMap*) Address = 0x118248bc7 (filename not found) [in UE4Editor-UnrealEd.dylib]
 UCookOnTheFlyServer::SaveCookedPackage(UPackage*, unsigned int, TArray&, TArray&) Address = 0x11807b3d7 (filename not found) [in UE4Editor-UnrealEd.dylib]
 UCookOnTheFlyServer::SaveCookedPackages(UPackage*, TArray const&, TArray const&, FCookerTimer&, unsigned int&, unsigned int&) Address = 0x118076d45 (filename not found) [in UE4Editor-UnrealEd.dylib]
 UCookOnTheFlyServer::TickCookOnTheSide(float, unsigned int&, ECookTickFlags) Address = 0x1180630fc (filename not found) [in UE4Editor-UnrealEd.dylib]
 UCookOnTheFlyServer::Tick(float) Address = 0x118060ebc (filename not found) [in UE4Editor-UnrealEd.dylib]
 FTickableEditorObject::TickObjects(float) Address = 0x11823b9fd (filename not found) [in UE4Editor-UnrealEd.dylib]
 UEditorEngine::Tick(float, bool) Address = 0x118238b1f (filename not found) [in UE4Editor-UnrealEd.dylib]
 UUnrealEdEngine::Tick(float, bool) Address = 0x118c2ff48 (filename not found) [in UE4Editor-UnrealEd.dylib]
 FEngineLoop::Tick() Address = 0x10f333d54 (filename not found) [in UE4Editor]
 GuardedMain(wchar_t const*) Address = 0x10f33db48 (filename not found) [in UE4Editor]
 -[UE4AppDelegate runGameThread:] Address = 0x10f347c8e (filename not found) [in UE4Editor]
 -[FCocoaGameThread main] Address = 0x10f5af891 (filename not found) [in UE4Editor-Core.dylib]
 Unknown() Address = 0x7fff4333887e (filename not found) [in Foundation]
 _pthread_body Address = 0x7fff6d7532eb (filename not found) [in libsystem_pthread.dylib]
 _pthread_start Address = 0x7fff6d756249 (filename not found) [in libsystem_pthread.dylib]
 thread_start Address = 0x7fff6d75240d (filename not found) [in libsystem_pthread.dylib]

Product Version: UE 4.22
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asked May 19 '19 at 09:13 AM in C++ Programming

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avatar image norlin May 19 '19 at 03:30 PM

Ohh it's so hard with mac sometimes. I'm a mac user and there are always some unexpected issues with UE4. I'm not sure about the exact issue, but have you checked your XCode version? should be 10.1 (not sure about newer version, older will definitely not work).

Also it's first thing to try to delete all the temp folders from the project (Binary, Build and Intermediate, as well as the xcode project/workspace – after remove all these, just generate the project from the context menu from the uproject file).

avatar image Usman-Mauqah May 20 '19 at 05:06 AM

Xcode and OS version is up-to-date, after hours of struggle i just gave up and created a new project, and imported the content in new project, everything is good now. still don't know the reason.

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