UE4+Flex error on packaging | Failed to produce item: UE4-Flex.lib

Hi, another noob here.
I’m very sure this is an easy fix but i just don’t know how and can’t find anything in the wiiiiiide web.

What i have done so far: First i downloaded the flex branch from nvidia’s Github page. I followed the instructions and all compiled successfully. The only issue so far, I had to recompile the UrealLightmass.exe because it was giving me an error. After recompiling no more errors. I was able to create flex objects and play inside the editor. Building is also done without any error, but when i try to package the project it gives me an error. (see log). I disabled antivirus but still no luck at all. Disabled UAC, no luck. Reinstalled, recompiled, no luck.

What i want to accomplish is a dry run with a default 3rd person view template + flex, from creating project to packaging. Just to know i’am able to before i spend days in modeling assets.

Note: I’ve also done the same on 2 different PC’s. Both Win10, i7 the other PC doesn’t even have a NVIDIA Graphics card and both giving me the same exact error.

Version Editor: 4.19.2-0+++UE4+Release-4.19+GameWorks (i also tryed with original nvidia source, same error)
Source: GitHub - Kryptexas/UE4-GameWorks-4.19.2: Master branch contains Blast, Flow, TXAA3, VXGI2, HBAO+, Hairworks and Flex 1.2 integrated into UE4 4.19.2 //Development currently on hold, no free time
Visual Studio 2017

Here is the Log:


Cmd: MAP CHECK NOTIFYRESULTS
MapCheck: New page: ThirdPersonExampleMap - 12.08.2020 10:53:33
MapCheck: Map check complete: 0 Error(s), 0 Warning(s), took 50,516ms to complete.
LogSavePackage: Save=628.37ms
LogSavePackage: Moving '../../../../../PimmelWars/NochEinTest/NochmalTesten/Saved/ThirdPersonExampleMap7999F9414492047A80CBF2A965BA02C9.tmp' to '../../../../../PimmelWars/NochEinTest/NochmalTesten/Content/ThirdPersonBP/Maps/ThirdPersonExampleMap.umap'
LogSavePackage: Display: Finished SavePackage ../../../../../PimmelWars/NochEinTest/NochmalTesten/Content/ThirdPersonBP/Maps/ThirdPersonExampleMap.umap
LogFileHelpers: Saving map 'ThirdPersonExampleMap' took 0.770
LogSavePackage: Save=251.70ms
LogSavePackage: Moving '../../../../../PimmelWars/NochEinTest/NochmalTesten/Saved/ThirdPersonExampleMap_BuiltData43DCF9AA4A7EB72F29E343AB7AF7B5C7.tmp' to '../../../../../PimmelWars/NochEinTest/NochmalTesten/Content/ThirdPersonBP/Maps/ThirdPersonExampleMap_BuiltData.uasset'
LogSavePackage: Display: Finished SavePackage ../../../../../PimmelWars/NochEinTest/NochmalTesten/Content/ThirdPersonBP/Maps/ThirdPersonExampleMap_BuiltData.uasset
UATHelper: Packaging (Windows (64-bit)): Running AutomationTool...
UATHelper: Packaging (Windows (64-bit)): Parsing command line: -ScriptsForProject=D:/PimmelWars/NochEinTest/NochmalTesten/NochmalTesten.uproject BuildCookRun -nocompileeditor -nop4 -project=D:/PimmelWars/NochEinTest/NochmalTesten/NochmalTesten.uproject -cook -stage -archive -archivedirectory=D:/PimmelWars/NochEinTest/Export -package -clientconfig=Development
-ue4exe=UE4Editor-Cmd.exe -pak -prereqs -nodebuginfo -targetplatform=Win64 -build -utf8output -compile
UATHelper: Packaging (Windows (64-bit)): Compiling scripts.
UATHelper: Packaging (Windows (64-bit)): DotNETUtilities -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\DotNETUtilities.dll
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\UnrealBuildTool.exe
UATHelper: Packaging (Windows (64-bit)): AutomationUtils.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationUtils.Automation.dll
UATHelper: Packaging (Windows (64-bit)): AllDesktop.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\AllDesktop\AllDesktop.Automation.dll
UATHelper: Packaging (Windows (64-bit)): Localization.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\Localization.Automation.dll
UATHelper: Packaging (Windows (64-bit)): OneSkyLocalization.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\OneSkyLocalization.Automation.dll
UATHelper: Packaging (Windows (64-bit)): AutomationScripts.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\AutomationScripts.Automation.dll
UATHelper: Packaging (Windows (64-bit)): Android.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\Android\Android.Automation.dll
UATHelper: Packaging (Windows (64-bit)): BuildGraph.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\BuildGraph.Automation.dll
UATHelper: Packaging (Windows (64-bit)): HTML5.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\HTML5\HTML5.Automation.dll
UATHelper: Packaging (Windows (64-bit)): MobileDeviceInterface -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\IOS\MobileDeviceInterface.dll
UATHelper: Packaging (Windows (64-bit)): IOS.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\IOS\IOS.Automation.dll
UATHelper: Packaging (Windows (64-bit)): Linux.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\Linux\Linux.Automation.dll
UATHelper: Packaging (Windows (64-bit)): Mac.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\Mac\Mac.Automation.dll
UATHelper: Packaging (Windows (64-bit)): TVOS.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\TVOS\TVOS.Automation.dll
UATHelper: Packaging (Windows (64-bit)): Win.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\Win.Automation.dll
UATHelper: Packaging (Windows (64-bit)): XLocLocalization.Automation -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\AutomationScripts\XLocLocalization.Automation.dll
UATHelper: Packaging (Windows (64-bit)): Took 2,0305051s to run MSBuild.exe, ExitCode=0
UATHelper: Packaging (Windows (64-bit)): Setting up ProjectParams for D:\PimmelWars\NochEinTest\NochmalTesten\NochmalTesten.uproject
UATHelper: Packaging (Windows (64-bit)): ********** BUILD COMMAND STARTED **********
UATHelper: Packaging (Windows (64-bit)): Running: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\bin\MSBuild.exe D:/UE4-GameWorks-4.19.2-master/UE4-GameWorks-4.19.2-master/Engine/Source/Programs/UnrealBuildTool/UnrealBuildTool.csproj /verbosity:minimal /nologo /property:Configuration=Development /property:Platform=AnyCPU
UATHelper: Packaging (Windows (64-bit)): DotNETUtilities -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\DotNETUtilities.dll
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool -> D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\UnrealBuildTool.exe
UATHelper: Packaging (Windows (64-bit)): Took 0,5678193s to run MSBuild.exe, ExitCode=0
UATHelper: Packaging (Windows (64-bit)): Running: D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\UnrealBuildTool.exe UE4Game Win64 Development -NoUBTMakefiles -remoteini="D:\PimmelWars\NochEinTest\NochmalTesten" -skipdeploy -noxge -generatemanifest -NoHotReload
UATHelper: Packaging (Windows (64-bit)): Took 5,6776523s to run UnrealBuildTool.exe, ExitCode=0
UATHelper: Packaging (Windows (64-bit)): Running: D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\UnrealBuildTool.exe UE4Game Win64 Development -NoUBTMakefiles -remoteini="D:\PimmelWars\NochEinTest\NochmalTesten" -skipdeploy -noxge -NoHotReload -ignorejunk
UATHelper: Packaging (Windows (64-bit)): Performing 5 actions (4 in parallel)
UATHelper: Packaging (Windows (64-bit)): Module.WmfMedia.cpp
UATHelper: Packaging (Windows (64-bit)): Module.Flex.gen.cpp
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Source\Flex\Classes/FlexFluidSurfaceActor.h(11): error C2504: "AInfo": Basisklasse undefiniert
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Source\Flex\Classes/FlexFluidSurfaceActor.h(12): error C3646: "Super": Unbekannter �berschreibungsspezifizierer
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Source\Flex\Classes/FlexFluidSurfaceActor.h(12): error C4430: Fehlender Typspezifizierer - int wird angenommen. Hinweis: "default-int" wird von C++ nicht unterst�tzt.
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Intermediate\Build\Win64\UE4\Inc\Flex\FlexFluidSurfaceActor.gen.cpp(63): error C2039: "StaticConfigName": Ist kein Element von "AFlexFluidSurfaceActor"
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Source\Flex\Classes/FlexFluidSurfaceActor.h(10): note: Siehe Deklaration von "AFlexFluidSurfaceActor"
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Intermediate\Build\Win64\UE4\Inc\Flex\FlexFluidSurfaceActor.gen.cpp(63): error C3861: "StaticConfigName": Bezeichner wurde nicht gefunden.
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Intermediate\Build\Win64\UE4\Inc\Flex\FlexFluidSurfaceActor.gen.cpp(63): error C2039: "AddReferencedObjects": Ist kein Element von "AFlexFluidSurfaceActor"
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Source\Flex\Classes/FlexFluidSurfaceActor.h(10): note: Siehe Deklaration von "AFlexFluidSurfaceActor"
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Intermediate\Build\Win64\UE4\Inc\Flex\FlexFluidSurfaceActor.gen.cpp(63): error C2065: "AddReferencedObjects": nichtdeklarierter Bezeichner
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Intermediate\Build\Win64\UE4\Inc\Flex\FlexFluidSurfaceActor.gen.cpp(63): error C3083: "Super": Das Symbol links neben "::" muss ein Typ sein.
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Intermediate\Build\Win64\UE4\Inc\Flex\FlexFluidSurfaceActor.gen.cpp(63): error C3083: "WithinClass": Das Symbol links neben "::" muss ein Typ sein.
UATHelper: Packaging (Windows (64-bit)): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Intermediate\Build\Win64\UE4\Inc\Flex\FlexFluidSurfaceActor.gen.cpp(65): error C2614: "AFlexFluidSurfaceActor": Unzul�ssige Elementinitialisierung: "Super" ist weder Basis noch Element
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\INCLUDE\vcruntime_new.h(71): error C4577: "noexcept" wird ohne angegebenen Ausnahmebehandlungsmodus verwendet. Die Beendigung bei einer Ausnahme ist nicht sichergestellt. Geben Sie "/EHsc" an.
UATHelper: Packaging (Windows (64-bit)): ERROR: UBT ERROR: Failed to produce item: D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Binaries\Win64\UE4-Flex.lib
PackagingResults: Error: UBT ERROR: Failed to produce item: D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Plugins\GameWorks\Flex\Binaries\Win64\UE4-Flex.lib
UATHelper: Packaging (Windows (64-bit)): Total build time: 78,05 seconds (Local executor: 0,00 seconds)
UATHelper: Packaging (Windows (64-bit)): Took 78,3203256s to run UnrealBuildTool.exe, ExitCode=5
UATHelper: Packaging (Windows (64-bit)): ERROR: Command failed (Result:5): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\UnrealBuildTool.exe UE4Game Win64 Development -NoUBTMakefiles -remoteini="D:\PimmelWars\NochEinTest\NochmalTesten" -skipdeploy -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool
-2020.08.12-14.54.09.txt'
UATHelper: Packaging (Windows (64-bit)): (see D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Programs\AutomationTool\Saved\Logs\UAT_Log.txt for full exception trace)
PackagingResults: Error: Command failed (Result:5): D:\UE4-GameWorks-4.19.2-master\UE4-GameWorks-4.19.2-master\Engine\Binaries\DotNET\UnrealBuildTool.exe UE4Game Win64 Development -NoUBTMakefiles -remoteini="D:\PimmelWars\NochEinTest\NochmalTesten" -skipdeploy -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool-2020.08.12-14.54.09.tx
t'
UATHelper: Packaging (Windows (64-bit)): AutomationTool exiting with ExitCode=5 (5)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults: Error: Unknown Error

just incase someone got the same error and is searching for it. I found the solution here: https://github.com/NvPhysX/UnrealEngine/pull/523

I am having the same error you had (UBT failed to produce the .lib) but that link you said had the solution is no longer up. Do you remember how you fixed this? I would greatly appreciate any help.