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Lightmass crashed: Assertion failed and more

Hi guys,

I got a problem. When I clicked Build, after a short time, the Message Log appeared with the error: Lightmass crashed: Assertion failed ... and so many things below.

Please see the image below.

So hope you guys can help me solve this problem. Many thanks and have a good day!!!

alt text

Product Version: UE 4.18
capture1.jpg (85.2 kB)
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asked Jan 16 '18 at 01:40 AM in Rendering

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11 1 1 1

avatar image Cobbra3d Jan 02 '19 at 08:23 PM

thank you thank you thank you so much

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2 answers: sort voted first

I installed the 4.19 preview and tried building the light maps and package the project into an exe and it worked. I think something happened to my 4.18 or it could be datasmith bug...

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answered Jan 17 '18 at 08:13 PM

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Ihab Kalache
16 2

avatar image Rseriki_HOK Jan 23 '18 at 05:36 PM

I had the same problem with 4.18. I was able to solve it by opening the Swarm agent window, validate the cache and then clearing the cache. alt text

swarm-window.jpg (68.3 kB)
avatar image lenouschka Dec 05 '18 at 05:12 PM

worked for me too, many thanks!! <3

avatar image Djoletta Dec 27 '18 at 04:52 PM

Thank you, worked for me also!!!!

avatar image Rosium Aug 02 '18 at 10:23 PM

How do you open the swarm agent application?? It never opens when i click on the exe. but it shows up on the task manager

avatar image InterlabUSP Nov 09 '18 at 12:14 AM

alt text When you are building your light, the Swarm Agent Icon shows in the windows icon bar

capturar.png (27.4 kB)
avatar image Virtual Jamie Dec 03 '18 at 08:10 PM

Thank you so much worked for me. That was killing me

avatar image AksAman May 30 '19 at 09:10 PM

Thanks for the swarm application fix!! It worked.

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Awesome way to fix that, thanks for sharing that knowledge!

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answered Oct 21 '18 at 07:54 PM

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