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Cooking fails from command line, succeeds in editor

I'm invoking the cook in powershell with .\UE4Editor-Cmd.exe PROJ -run=cook -targetplatform=Windows

It's failing with the following error:

 Error: Fatal error: [File:C:\wkspc\main\UE4\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerSave.cpp] [Line: 240]
 Error: Attempt to map an object during save that was not listed as a dependency. Saving Export 824 K2Node_CallFunction_1688 in /Game/PROJ/UI/prototyping/HUD/Blueprints/HUD_PROJ. Missing Dep on Import /Script/Engine.

There are no related data validation errors, and the cook succeeds within the editor if I run it there, the error only appears when using the command line.

What is going on here?

Product Version: UE 4.20
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asked Feb 27 '19 at 02:13 PM in Packaging & Deployment

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