Undefined symbol error in UUserToolBoxBaseBlueprint.

Development Programming & Scripting C++
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1

I’m trying to compile for carla-simulator in UBT22.04 UE5.5 and getting linker errors.

ld.lld: error: undefined symbol: UUserToolBoxBaseBlueprint::Execute()
>>> referenced by Module.UserToolBoxCore.cpp
>>>               ../Plugins/Experimental/UserToolBoxCore/Intermediate/Build/Linux/x64/UnrealEditor/Development/UserToolBoxCore/Module.UserToolBoxCore.cpp.o:(vtable for UUserToolBoxBaseBlueprint)
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

and I found that execute() is

#include "UserToolBoxBaseBlueprint.h"

void UUserToolBoxBaseBlueprint::Execute()
{
    Command(); // 调用蓝图事件
}

The Command() is called in other func and there were no errors there, only occurs here. How to fix this problem?

2

Command is part of Parse.cpp / h in the core / misc.

The error is a red herring. Try adding the module UserToolBoxCore to your build file and make sure your project is the default startup project and not the engine itself.