Unable to build HLOD and World Partition Editor Minimap after v35.00

General Issues and Bug Reporting
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1

Summary

Hello, I’m currently unable to build HLOD and the World Partition Editor Minimap. The build gets stuck indefinitely. This started happening since v35.00, even in projects that previously took a maximum of 30 minutes to build both HLOD and World Partition Editor Minimap. This also shows up in the logs:

[239]LogMemory: Warning: Freeing 33554432 bytes (32.0 MiB) from backup pool to handle out of memory.
[2025.05.09-19.29.07:848][239]LogMemory: Warning: MemoryStats:
AvailablePhysical 9223200768 (8.59 GiB)
AvailableVirtual 5971968 (0.01 GiB)
UsedPhysical 4955082752 (4.61 GiB)
PeakUsedPhysical 14377836544 (13.39 GiB)
UsedVirtual 61581955072 (57.35 GiB)
PeakUsedVirtual 61691748352 (57.45 GiB)
[2025.05.09-19.29.07:849][239]Allocator Stats for Mimalloc: (not implemented)
[2025.05.09-19.29.07:849][239]LogWindows: Error: appError called: Fatal error: [File:Z:\UEVFS\Root\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformMemory.cpp] [Line: 263]
Ran out of memory allocating 4194304 (4.0 MiB) bytes with alignment 0. Last error msg: The paging file is too small for this operation to complete..

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

World Building

Steps to Reproduce

Build HLOD and World Partition Editor Minimap

Expected Result

HLOD and World Partition Editor Minimap successfully builded

Observed Result

both builds gets stuck indefinitely and ran out of memory allocating error(paging file too small) in logs file

Platform(s)

windows

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3

This happens to me too from the v35.00 update :sob:

1 Like
4

You’ve run out of virtual memory,

Go to your Advanced Windows Settings - Advanced - Virtual Memory and change the size of your Windows paging file to more than 64 GB
You’ll have to restart your PC to apply the changes
The bigger the better
You’ll notice landscape shader loading times will be much faster as well as other stuff.
Best performance from a seperate SSD used only for the paging file.

5

I already did, but build keeps gets stuck indefinitely

1 Like
6

it worked, after 4h successfully completed the build(I also set the view mode to unlit)

1 Like
7

FORT-909607 is now ‘In Progress’! Our team is actively working on it!