Light map wont build

Hello.
I´ve got a urgent problem where I´m build my Light maps wont build. I´ve tried to check the Override Light Map Resolution but it wont build right. Is there anything I can do?

Hi, sorry for the bad detail, its early morning here haha.
I dont get any type or error and I can see the Swarm program.

What I mean is that I change the Light Map Resolutions but when I build is seems to get back defualt.

Hi! We need more information. Let’s start with these bits… First, what happens exactly? Do you get an error (and if so what is it)? Or does it just hang at some point (and if so at which point specifically)? Second, check your taskbar. Do you see an icon for the “Swarm” program? UE4 should start that when you build lighting.

Not my area of expertise but I’m looking around on the forums… Did you try saving all before building the lighting?