HLODs Failing Immediately

General Issues and Bug Reporting
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1

Summary

Attempting to build or delete HLODs leads to a near-instant failure.

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

  1. Load into a level with Streaming Enabled
  2. Go to Build → Build HLODs
  3. Press either Build HLODs or, if needed, Delete HLODs

Expected Result

It should take anywhere from a few minutes to an hour or two to build HLODs, with messages in the popup window showing what’s going on.

Observed Result

The popup window sits on “Building HLODs” for a few seconds before displaying the “Build Failed!” popup.

Platform(s)

windows

Upload an image

Screenshot 2026-04-22 111812.png
Screenshot 2026-04-22 111812.png632×229 59.4 KB
Screenshot 2026-04-22 111649.png
Screenshot 2026-04-22 111649.png1465×502 156 KB

Additional Notes

The displayed error in the log is attached as an image.

2

Do you have URC enabled? Because in projects where I’ve disabled it, the HLOD build does NOT fail

1 Like
3

I’ve tried building both with URC enabled and disabled. There was an issue I ran into prior to v40.20 where some HLOD assets were checked out, causing the failure, but that seems to not be the case here.

2 Likes
4

@most3r there was a bug related to URC and HLOD building, but we pushed a fix for that a few days ago, so this should no longer be happening. If you could confirm whether you’re still seeing URC-related HLOD failures that’d be very helpful for us to verify the fix was effective.

2 Likes
6

The status of FORT-1100457 changed to ‘Needs Triage’. We’ve confirmed the issue and it’s waiting to be assigned to someone to fix it.

7

Sorry for the late reply; I can confirm that this no longer happening