Build bug: Running out of trivial memory.

Development Rendering
1

I keep getting a bizarre error, it was just a simple level I was putting together to test some meshes. There is only one lightsource (a ‘sun’) and a lightmass importance volume that’s only about 3000x1000 units, but every build fails because of, as far as I can discern - running out of memory having used virtually no memory. Before anyone asks, my computer has 16gb of ram and 4gb of vram - so 32 bytes is definitely not my capacity! :slight_smile:

Error <None> === Lightmass crashed: ===
Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Programs\UnrealLightmass\Private\Lighting\LightingSystem.cpp] [Line: 1324]
Static lighting thread exception:
Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformMemory.cpp] [Line: 54]
Ran out of memory allocating 32 bytes with alignment 0

UnknownModule!UnknownFunction (0x00007ffb44a8606c) + 0 bytes [UnknownFile:0]
UnknownModule!UnknownFunction (0x00000003de566cd8) + 0 bytes [UnknownFile:0]
UnknownModule!UnknownFunction (0x00007ffb02ecc2b8) + 0 bytes [UnknownFile:0]
UnknownModule!UnknownFunction (0x00007ffb02ecc2b8) + 0 bytes [UnknownFile:0]

Thanks for the help!

Edit: Update, I tried deleting all lights and fogs and light projecting materials out of the map to see if I could render without any lights at all. Same error. Is it perhaps something to do with the Swarm Connection? Is there a way to disable that?

2

What’s your StaticLightingResolution? Better yet, don’t tell me just lower it because I’m pretty sure that’s where your issue is. If not, post here and I’ll try again.

3

Thanks for the advice Lindsay - I turned it down but the problem persisted.

The source was a single mesh that seemed to be causing the lighting to fail to build. I played around with its light interaction but eventually I just deleted it and re-made it. So now the level works :smiley: