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FString overloaded params: none of the 11 overloads could convert all the argument types

I got this error trying to overload a method for message debugging purposes:

 1>g:\epic games\ue_4.15\engine\source\runtime\core\public\Logging/LogMacros.h(34): error C2665: 'CheckVA': none of the 11 overloads could convert all the argument types
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(87): note: could be 'bool CheckVA(bool)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(86): note: or       'void *CheckVA(ANSICHAR *)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(85): note: or       'TCHAR CheckVA(TCHAR)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(84): note: or       'long CheckVA(unsigned long)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(83): note: or       'long CheckVA(long)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(82): note: or       'double CheckVA(double)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(81): note: or       'int64 CheckVA(int64)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(80): note: or       'uint64 CheckVA(uint64)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(79): note: or       'int32 CheckVA(int32)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(78): note: or       'uint8 CheckVA(uint8)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Misc/VarArgs.h(77): note: or       'uint32 CheckVA(uint32)'
 1>  g:\epic games\ue_4.15\engine\source\runtime\core\public\Logging/LogMacros.h(34): note: while trying to match the argument list '(FString)'
 note: see reference to function template instantiation 'void FMsg::Logf_Internal<FString>(const ANSICHAR *,int32,const FName &,ELogVerbosity::Type,const TCHAR *,T1)' being compiled

I'm not sure, but this means FString is not supported for overloading? I didn't understand this error

Here's the relevant part of the code:


 void DebugMethod_LowPriority(FString ClassName, FString MethodName, TArray<FString> AdditionalInformation);
 void DebugMethod_LowPriority(FString ClassName, FString MethodName);
Product Version: UE 4.15
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asked May 01 '17 at 07:50 PM in C++ Programming

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avatar image Gbr May 01 '17 at 07:58 PM

In the end it has nothing to do with what I thought, the problem is in this line, inside the method definition:

 UE_LOG(LogTemp, Log, TEXT("%s"), FinalMessage);

FinalMessage is a FString.

I need to find the proper way to include this FString correctly in this case.

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1 answer: sort voted first

Dereferencing the FString does the trick

  UE_LOG(LogTemp, Log, TEXT("%s"), *FinalMessage);

Sorry for the confusion that led to this thread, at least I got to solve this by myself (and Rama, as always https://wiki.unrealengine.com/Logs,_Printing_Messages_To_Yourself_During_Runtime#Related_Tutorial) =]

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answered May 01 '17 at 08:12 PM

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44 5 13 15

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