Everytime I build a unreal engine project, vs keeps warning like this: unable to get MBCS string

Development Pipeline & Plugins
, ,
1

2> -------------------------------------------------------------------------------
2> --------------------Project: Default-------------------------------------------
2> MyProjectCharacter.cpp (0:01.59 at +0:00)
2> EXEC : warning : unable to get MBCS string (input text '??: ?? ??:%s%s
2> ', library C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.26.28801\bin\HostX64\x64\1042\clui.dll)
2> UE4Editor-MyProject-0002.dll (0:00.68 at +0:01)
2> Creating library C:\Users\grand\GameDev\MyProject\Intermediate\Build\Win64\UE4Editor\Development\MyProject\UE4Editor-MyProject-0002.suppressed.lib and object C:\Users\grand\GameDev\MyProject\Intermediate\Build\Win64\UE4Editor\Development\MyProject\UE4Editor-MyProject-0002.suppressed.exp
2> UE4Editor-MyProject-0002.lib (0:00.07 at +0:02)
2> Creating library C:\Users\grand\GameDev\MyProject\Intermediate\Build\Win64\UE4Editor\Development\MyProject\UE4Editor-MyProject-0002.lib and object C:\Users\grand\GameDev\MyProject\Intermediate\Build\Win64\UE4Editor\Development\MyProject\UE4Editor-MyProject-0002.exp
2> MyProjectEditor.target (0:00.17 at +0:02)
2> ---------------------- Done ----------------------

There’s no problem with compiling, but this warning keeps showing up on the output window. Is this just a trivial thing that has nothing to do with the game I’m making? or can it make some problems later? I googled this warning, but nothing I can find. What I did to solve it is downgrading engine version to 4.24, reinstalling VS and UE4, installing MSVC v141, v140(verion 2017, 2015).

2

Engine\Extras\Windows\cl-filter\cl-filter.cpp modify this source.

GetLocalizedIncludePrefix : 386 line

//int Result = WideCharToMultiByte(CodePage, 0, Text, (int)(TextEnd - Text), Prefix.data(), Length, NULL, NULL);
int Result = WideCharToMultiByte(CP_ACP, 0, Text, (int)(TextEnd - Text), Prefix.data(), Length, NULL, NULL);
if (Result == 0)
{
	wprintf(L"WARNING: unable to get MBCS string (input text '%s', library %s)", Text, LibraryPath);
	return false;
}

then build by release mode.
(you have to need retarget solution, if your sdk version not matched with solution.
solution explorer : select cl-filter solution → right click → retarget solution)

3

Thank you so much! You save my life!