Project conversion failed (4.6.1) - LNK1104 cannot open file

Development Platform & Builds
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1

Hi,

I wanted to convert my project from 4.5.1 to 4.6.1 UE version, but came across fatal error LNK1104: cannot open file UE4Editor-Core.dll. This is the build output log:

The project failed to compile with this version of the engine. Build output is as follows:
Running C:/Program Files/UnrealEngine/Engine/Binaries/DotNET/UnrealBuildTool.exe RTSGame Development Win64 -project="C:/Users/DarkLiquidus/Documents/UNREAL/RTSGame/RTSGame.uproject" -editorrecompile -progress
Building UnrealHeaderTool...
Target is up to date.
Parsing headers for RTSGameEditor
Reflection code generated for RTSGameEditor
Performing 280 actions (4 in parallel)
[1/280] Link UE4Editor-Core.dll
[4/280] Resource ModuleVersionResource.rc.inl
Module.UE4Game.cpp
LINK : fatal error LNK1104: cannot open file 'C:\Program Files\UnrealEngine\Engine\Binaries\Win64\UE4Editor-Core.dll'
PCH.RTSGame.RTSGame.h.cpp
[5/280] Resource RTSGame.rc
MyAIControllerCrowds.cpp
RTSGame.generated.cpp
RTSGame.cpp
AutoStartupModuleListGetter.generated.cpp
C:\Users\DarkLiquidus\Documents\UNREAL\RTSGame\Source\RTSGame\MyAIControllerCrowds.cpp(7): warning C4996: FPostConstructInitializeProperties is deprecated and was renamed to FObjectInitializer. Please use that type instead.
-------- End Detailed Actions Stats -----------------------------------------------------------
ERROR: UBT ERROR: Failed to produce item: C:\Program Files\UnrealEngine\Engine\Binaries\Win64\UE4Editor-Core.pdb
Cumulative action seconds (8 processors): 0,00 building projects, 16,49 compiling, 0,00 creating app bundles, 0,00 generating debug info, 0,13 linking, 0,00 other
UBT execution time: 60,60 seconds
2

Nobody knows what might cause this?

3

Hi DarkLiquidus,

Sorry for the delay in responding to your post. I am curious if you could confirm whether the process you followed to upgrade your project went something like this:

  • Built version 4.6.1 of the Engine from source code.
  • Ran the UE4Editor.exe file that was created.
  • At the Unreal Project Browser window, selected your project and clicked Open (or double-clicked on the project).
  • Chose “Open a copy” from the Convert Project prompt that appeared.
  • The automatic conversion failed and you selected the option to “Open with Visual Studio.”
  • When the project opened in Visual Studio, immediately started building the project without closing the Unreal Project Browser window.
  • Had the build fail with the error message you mentioned above.

Is that similar to the process that you followed?

4

Hi DarkLiquidus,

We have not heard back from you for some time. Do you still need help with this issue? I will be marking this issue as resolved for tracking purposes. If you still need any help with this, please feel free to re-open this post.