Building Light stuck at 75%

I have deleted saved and intermediate and the Unreal Engine local app data.

I have opened swarm agent and cleaned cache and validated.

No matter what, building light will reach 75% and will never progress.

I had the same issue (but at 66%), but it somehow did go away. I had invalid blueprints on some maps, which I fixed. Maybe that was it.

Hello Dannyk90,

From what you described it sounds like your lightmass is building while your lighting build gets stuck and doesn’t complete it’s build.

I have a little information I would like to receive from you in order to narrow down what could be causing this.

If you would send me a link of your DxDiag, I will see if there is an issue that is native to your computer.
Does this happen in 4.8?
Is this in a project that was copied from 4.8 to 4.9?

Thanks,

It has been working before, all I have done is add a new level with a light.

This is a 4.9 only project.

link text

This appears to be another issue where the Lightmass is running but the build gets stuck at different percentages.

The bug number currently associated with this bug is UE-20782.

Thank you very much for reporting this issue.

I will keep you p to date with it’s progress.

thank you .