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!!!
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…
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.
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
Awesome way to fix that, thanks for sharing that knowledge!
When you are building your light, the Swarm Agent Icon shows in the windows icon bar
Thank you so much worked for me. That was killing me
worked for me too, many thanks!! <3
Thank you, worked for me also!!!
thank you thank you thank you so much
Thanks for the swarm application fix!! It worked.
worked for me, thanks!
funciono gracias:
Rseriki_HOK
Hello guys! I have a similar problem, but it is not solved with the Swarm Agent! What can be? Thank you!
I doesn’t work for me and still crashing after validate/cleaning the cache, any idea what should I try next?
Thank you.
It doesn’t work for me and it’s still crashing after validate/cleaning the cache, any idea what should I try next?
Thank you.
You sir, are a hero today.
Thanks! 
worked for me too, thanks 
Worked for me Thank you. UE 4.26
