Error Message when running PSO Cache 'ShaderPipelineCacheTools' commandlet.

Development Platform & Builds Debugging, Optimization, & Profiling
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Okay so this is what worked for me.

  1. In the section Setup and Required Settings - Set the following value in your Engine.ini file:
    [DevOptions.Shaders]
    NeedsShaderStableKeys=true ,this needs to be True capital “T”

  2. Converting PSO Caches (also known as expansion)
    Here is my working commandlet
    E:\Epic Games\Engine\UE_5.1\Engine\Binaries\Win64>UnrealEditor-Cmd.exe “E:\Epic Games Projects\HighTown UE5.1 Post ALS\HighTown51.uproject” -run=ShaderPipelineCacheTools expand C:\PSOCache*.rec.upipelinecache C:\PSOCache*.shk C:\PSOCache\TEST_HighTown51_PCD3D_SM6.spc

Please note the " \ " after PSOCache that are not there in the documentation. This will produce the .spc certificate.

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