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Upgrading from UE4.20 to UE4.22.1 "Unable to merge actions producing RMPlayerController.cpp.obj: prerequisites are different"

I pulled and built the engine in a clean directory, then attempted to convert my project (copy) and received this message. Anyone have tips?

 The project could not be compiled. Would you like to open it in Visual Studio?
 
 Running E:/UnrealEngine-4.22.1-clean/Engine/Binaries/DotNET/UnrealBuildTool.exe Development Win64 -Project="D:/RedMarsGame/Application/RedMarsColonizer 4.22/RedMarsColonizer.uproject" -TargetType=Editor -Progress -NoHotReloadFromIDE
 Creating makefile for RedMarsColonizerEditor (no existing makefile)
 @progress push 5%
 Creating makefile for UnrealHeaderTool (no existing makefile)
 @progress push 5%
 @progress pop
 Parsing headers for RedMarsColonizerEditor
   Running UnrealHeaderTool "D:\RedMarsGame\Application\RedMarsColonizer 4.22\RedMarsColonizer.uproject" "D:\RedMarsGame\Application\RedMarsColonizer 4.22\Intermediate\Build\Win64\RedMarsColonizerEditor\Development\RedMarsColonizerEditor.uhtmanifest" -LogCmds="loginit warning, logexit warning, logdatabase error" -Unattended -WarningsAsErrors
 Reflection code generated for RedMarsColonizerEditor in 39.0908656 seconds
 @progress pop
 ERROR: Unable to merge actions producing RMPlayerController.cpp.obj: prerequisites are different
 ERROR: Unable to merge actions producing RMPlayerController.cpp.obj: prerequisites are different
 ERROR: Action graph is invalid; unable to continue. See log for additional details.
 
 
Product Version: UE 4.22
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asked May 18 '19 at 11:00 PM in C++ Programming

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Slavaslave
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Okay, looks like I had somehow copied my .cpp implementation or generated a new one in VS, thus giving me two conflicting copies.

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answered May 18 '19 at 11:35 PM

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Slavaslave
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