Packing Failed (Windows 64-Bit)

Development Platform & Builds
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1

when i try to export my projekt to Windows 64-bit this error show up:

UATHelper: Packaging (Windows (64-bit)): Running AutomationTool…
UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException: A conflicting instance of AutomationTool is already running. Curent location: D:\Unreal 4\UE_4.17\Engine\Binaries\DotNET\AutomationTool.exe. A process manager may be used to determine the conflicting process and what too
l may have launched it
UATHelper: Packaging (Windows (64-bit)): em AutomationTool.InternalUtils.RunSingleInstance(Func2 Main, Object Param) UATHelper: Packaging (Windows (64-bit)): em AutomationTool.Program.Main() UATHelper: Packaging (Windows (64-bit)): Program.Main: AutomationTool exiting with ExitCode=1 (Error_Unknown) UATHelper: Packaging (Windows (64-bit)): BUILD FAILED PackagingResults: Error: Unknown Error LogSlate: Took 0.000593 seconds to synchronously load lazily loaded font '../../../Engine/Content/Editor/Slate/Fonts/DroidSansMono.ttf' (77K) UATHelper: Packaging (Windows (64-bit)): Running AutomationTool... UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException: A conflicting instance of AutomationTool is already running. Curent location: D:\Unreal 4\UE_4.17\Engine\Binaries\DotNET\AutomationTool.exe. A process manager may be used to determine the conflicting process and what too l may have launched it UATHelper: Packaging (Windows (64-bit)): em AutomationTool.InternalUtils.RunSingleInstance(Func2 Main, Object Param)
UATHelper: Packaging (Windows (64-bit)): em AutomationTool.Program.Main()
UATHelper: Packaging (Windows (64-bit)): Program.Main: AutomationTool exiting with ExitCode=1 (Error_Unknown)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults: Error: Unknown Error

2

I had a similar error, also with “A conflicting instance of AutomationTool is already running” message. What solved for me was:

  1. Delete the Intermediate folder
  2. Right click on the .uproject file
  3. Generate Visual Studio project files
  4. Try packaging again

Thanks to the answer on this thread.