Cooking unreferenced assets

Hi Jamie, thanks for looking into this further. I gave this a go and at first had no success, both command line and Editor packaging.

For some reason I thought this might be linked to an issue i’m having (reported here) with HTML5 packaging failed due to a space in the directory structure. I went ahead and moved my projects to the root of my J:/ and packaged. It worked and always cooked the given directories

From the log when Packaging from editor, this is the command that fails to Always Cook:
LogInit: Command line: “J:\Game Projects\Active\Unreal Projects\SHMG\SHMG.uproject” -run=Cook -MapIniSection=AllMaps -CookDir=J:/Game Projects/Active/Unreal Projects/SHMG/Content/Character/PartsTest+J:/Game Projects/Active/Unreal Projects/SHMG/Content/Character/SaveThis -TargetPlatform=WindowsNoEditor -buildmachine -Unversioned -fileopenlog -abslog=E:\GitHub\UnrealEngine\Engine\Programs\AutomationTool\Saved\Logs\Cook.txt -stdout -FORCELOGFLUSH -CrashForUAT -unattended -AllowStdOutLogVerbosity

Command that is able to always cook:

LogInit: Command line: J:\SHMG\SHMG.uproject -run=Cook -MapIniSection=AllMaps -CookDir=J:/SHMG/Content/Character/PartsTest+J:/SHMG/Content/Character/SaveThis -TargetPlatform=WindowsNoEditor -buildmachine -Unversioned -fileopenlog -abslog=E:\GitHub\UnrealEngine\Engine\Programs\AutomationTool\Saved\Logs\Cook.txt -stdout -FORCELOGFLUSH -CrashForUAT -unattended -AllowStdOutLogVerbosity 

Is this a known requirement to have the projects parent-directories free of spaces that I missed? Are others not experiencing this?