Problem with build: Assertion failed 735

Development Platform & Builds
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1

Hi,
I have a game that runs perfectly fine in the editor and as “standalone game” out of the editor.

Packaging the game works also fine - no errors, only some warnings.

But if i start the packaged game I have the following issues:

Packaged in Shipping Mode:
it either doesnt start (Game Window is opening up, rendering the first frame of the intro video, then it is hanging - “no response” in taskmanager).
or sometimes it starts properly but the memory gets big really fast (starting at 9GB, adding up to 28 GB)
in the editor it only uses about 1.5 GB

Packaged in Development Mode:
It starts, opens the game Window and throws this error:

Assertion failed: Ar.IsLoading()
[File:D:/Build/++UE4/Sync/Engine/Source/Runtime/CoreUObject/Private/Serialization/BulkData2.cpp]
[Line: 735] FBulkDataBase only works
with loading

345536-error.png

Do you have any idea, what the reason for this could be?
thanks!

2

Found the Problem: I have a blueprint that spawns different blueprints, containing lights.
When it spawned it crashed.

I removed this blueprint from my scene and everything seems to work.
RAM of the build is around 400 MB, so much better!