It is crashing like this. The processor | Unreal Source | Page 1

rotund wren Dec 31, 2025, 5:54 PM

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📎 MassGrantExperienceProcessor.cpp

fair marlin Dec 31, 2025, 5:56 PM

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Hmm, can you try replacing

ProcessorRequirements.AddSubsystemRequirement<UMassSpawnerSubsystem>(EMassFragmentAccess::ReadWrite);

by

EntityQuery.AddSubsystemRequirement<UMassSpawnerSubsystem>(EMassFragmentAccess::ReadWrite);

rotund wren Dec 31, 2025, 5:56 PM

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sure lets give it a try

fair marlin Dec 31, 2025, 5:56 PM

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Also, can you get the subsystem from the query context?

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Instead of capturing it and passing it to the lambda function

rotund wren Dec 31, 2025, 6:02 PM

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nop it is the same error

fair marlin Dec 31, 2025, 6:03 PM

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I can't debug it myself right now, but there's a chance this has to be executed in a deferred mass command. If you call SpawnEntities inside the lambda body of a custom mas deferred command do you still get the same error?

rotund wren Dec 31, 2025, 6:03 PM

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looks liek the MassSpawner is a Sync function, not allowed during processing phases, I should use an async / deferred version, but I haven't seen any using an entity config

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I need to investigate how to do that, haven't tried that. Will come back when I figure the custom command

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yea the command actually works, I wonder if is ok to use it like this

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thanks a lot!!

#It is crashing like this. The processor