# Ensure condition failed: !ActorCDO-\>bExchangedRoles **URL:** \ **Category:** Blueprint\ **Tags:** error, unknown, cdo, unreal-engine, question, Blueprint\ **Created:** [July 16, 2015, 11:17am UTC](https://forums.unrealengine.com/t/ensure-condition-failed-actorcdo-bexchangedroles/325476 "2015-07-16T11:17:52Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![MADHOUSE](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MADHOUSE](https://forums.unrealengine.com/u/MADHOUSE)\ **Post date:** [July 16, 2015, 11:17am UTC](https://forums.unrealengine.com/t/ensure-condition-failed-actorcdo-bexchangedroles/325476/1 "2015-07-16T11:17:52Z")
This error shows up in log and repeats a few times, I noticed it after packaging my project, altho packaging does not fail. This error must have been around for some time. (dont know if its 4.8 specific) What does this mean? Where does it come from? Whats a CDO? This error is a mystery to me… ``` [2015.07.11-17.09.08:109][50]LogOutputDevice: === Handled error: === Ensure condition failed: !ActorCDO->bExchangedRoles [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Editor\KismetCompiler\Private\KismetCompiler.cpp] [Line: 1803] Your CDO has had ExchangeNetRoles called on it (likely via RerunConstructionScripts) which should never have happened. This will cause issues replicating this actor over network due to mutated transient data! Stack: UE4Editor-Core.dll!FWindowsPlatformStackWalk::StackWalkAndDump() {0x000007fee67da806} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FDebug::EnsureFailed() {0x000007fee6674031} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FDebug::EnsureNotFalse_OptionallyLogFormattedEnsureMessageReturningFalse() {0x000007fee66742e3} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-KismetCompiler.dll!FKismetCompilerContext::FinishCompilingClass() {0x000007fee6c394ea} + 58 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-KismetCompiler.dll!FKismetCompilerContext::Compile() {0x000007fee6c10270} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-KismetCompiler.dll!FKismet2CompilerModule::CompileBlueprintInner() {0x000007fee6c12bc0} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-KismetCompiler.dll!FKismet2CompilerModule::CompileBlueprint() {0x000007fee6c122e8} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-UnrealEd.dll!FKismetEditorUtilities::CompileBlueprint() {0x000007fee15cfc4d} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-UnrealEd.dll!FBlueprintEditorUtils::RegenerateBlueprintClass() {0x000007fee1578796} + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::RegenerateBlueprintClass() {0x000007fee6ef5d18} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::FinalizeBlueprint() {0x000007fee6ebdff9} + 15 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::Preload() {0x000007fee6f91f08} + 11 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::CreateExport() {0x000007fee6f5f840} + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::IndexToObject() {0x000007fee6f85584} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::CreateExport() {0x000007fee6f5ec7e} + 11 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::CreateExportAndPreload() {0x000007fee6f5fb5b} + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::LoadAllObjects() {0x000007fee6f8814a} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!LoadPackageInternal() {0x000007fee7064903} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::VerifyImportInner() {0x000007fee6fb7bb0} + 49 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::VerifyImport() {0x000007fee6fb6b0b} + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::VerifyImportInner() {0x000007fee6fb80d0} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::VerifyImport() {0x000007fee6fb6b0b} + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::Verify() {0x000007fee6fb67e2} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::FinalizeCreation() {0x000007fee6f6b055} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::Tick() {0x000007fee6fb5580} + 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!FLinkerLoad::CreateLinker() {0x000007fee6f61b5f} + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!GetPackageLinker() {0x000007fee6f7ea40} + 23 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!LoadPackageInternal() {0x000007fee70646d7} + 34 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!ResolveName() {0x000007fee7071782} + 57 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!StaticLoadObjectInternal() {0x000007fee70794f1} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-CoreUObject.dll!StaticLoadObject() {0x000007fee7078dea} + 32 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!FAssetData::GetAsset() {0x000007fed8285cb7} + 62 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!SContentBrowser::OnAssetsActivated() {0x000007fed82f1691} + 139 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,TTypeWrapper __cdecl(TArray const &__ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() {0x000007fed82612d7} + 38 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,void __cdecl(TArray const &__ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() {0x000007fed826d117} + 14 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!SAssetView::OnListMouseButtonDoubleClick() {0x000007fed82fe40a} + 42 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper __cdecl(TSharedPtr)>::Execute() {0x000007fed825fe31} + 52 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl(TSharedPtr)>::ExecuteIfSafe() {0x000007fed826c33a} + 37 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!TBaseDelegate >::ExecuteIfBound() {0x000007fed82695b6} + 38 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!SListView >::Private_OnItemDoubleClicked() {0x000007fed8316f9f} + 41 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-ContentBrowser.dll!STableRow >::OnMouseButtonDoubleClick() {0x000007fed82fe68f} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!::operator()() {0x000007fee2df41fe} + 9 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!FEventRouter::Route >() {0x000007fee2dac4ad} + 21 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonDoubleClickEvent() {0x000007fee2e67b43} + 96 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!FSlateApplication::OnMouseDoubleClick() {0x000007fee2e55439} + 19 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::ProcessDeferredMessage() {0x000007fee67cd1fd} + 32 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::DeferMessage() {0x000007fee67b45c1} + 74 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::ProcessMessage() {0x000007fee67ce99f} + 44 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::AppWndProc() {0x000007fee67ae1aa} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou USER32.dll {0x0000000076e09bd1} + 0 bytes USER32.dll {0x0000000076e098da} + 0 bytes UE4Editor-Core.dll!FWindowsPlatformMisc::PumpMessages() {0x000007fee67cfd56} + 48 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!FEngineLoop::Tick() {0x000000013fdd3c7a} + 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!GuardedMain() {0x000000013fdc49cc} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!GuardedMainWrapper() {0x000000013fdc4a4a} + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!WinMain() {0x000000013fdd65c9} + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!__tmainCRTStartup() {0x000000013fdd75d9} + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618] kernel32.dll {0x0000000076ce652d} + 0 bytes ntdll.dll {0x0000000076f1c541} + 0 bytes ntdll.dll {0x0000000076f1c541} + 0 bytes ``` ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [July 16, 2015, 3:12pm UTC](https://forums.unrealengine.com/t/ensure-condition-failed-actorcdo-bexchangedroles/325476/2 "2015-07-16T15:12:43Z")
Hey, I’ve assigned someone to look into this error for you, and they’ll post here if they have any questions for you. Thanks for report! ---
**Author:** ![xhallix](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@xhallix](https://forums.unrealengine.com/u/xhallix)\ **Post date:** [July 17, 2015, 2:39pm UTC](https://forums.unrealengine.com/t/ensure-condition-failed-actorcdo-bexchangedroles/325476/3 "2015-07-17T14:39:12Z")
I have same when starting debug editor ---
**Author:** ![wittlief\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@wittlief\_1](https://forums.unrealengine.com/u/wittlief_1)\ **Post date:** [July 17, 2015, 9:14pm UTC](https://forums.unrealengine.com/t/ensure-condition-failed-actorcdo-bexchangedroles/325476/4 "2015-07-17T21:14:53Z")
[CDO means 'class default object](https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/Objects/index.html). This ensure is caused by using Create Child Blueprint Class on a blueprint created from an empty actor. If your project packages and does not crash, you can safely ignore it, or you can try to locate which empty actor has had a child blueprint created from it. Good luck! ---
**Author:** ![MADHOUSE](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MADHOUSE](https://forums.unrealengine.com/u/MADHOUSE)\ **Post date:** [July 19, 2015, 12:11pm UTC](https://forums.unrealengine.com/t/ensure-condition-failed-actorcdo-bexchangedroles/325476/5 "2015-07-19T12:11:58Z")
Okay, I’ll see what I can find out, however I dont ever call Create Child Blueprint Class on any actor/blueprint. only empty actor that exists was an empty c++ actor created to get source files generated to bp project. Could this be cause? I’ll get back if I find any more info. Im currently not experiencing any issues. Thanks for your assistance! ---
**Author:** ![LDodds](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@LDodds](https://forums.unrealengine.com/u/LDodds)\ **Post date:** [August 22, 2016, 6:32pm UTC](https://forums.unrealengine.com/t/ensure-condition-failed-actorcdo-bexchangedroles/325476/6 "2016-08-22T18:32:23Z")
Having same problem, please help > **[Ensure condition failed: !ActorCDO-\>bExchangedRoles](https://forums.unrealengine.com/questions/473788/ensure-condition-failed-actorcdo-bexchangedroles-1.html)** > > Got two of these errors when I try to do a shipping package on my game, cooks also fail. Help? This is the full log