Buildind Light Error

Hi! When i build the light he do all, but when ends he gives-me a error and i already try changing some lights in the project but he gives-me the same error.
Someone can help me?

I recomend to you to create a new level, just to test if you got something wrong on the engine. Add a couple of lights and a couple of meshes and make the lightmaps.

If everything goes right, then is something in your actual map.
Perhaps you got lightmap sizes to big for too many objects and you consume all your memory.
Try adjusting sizes and number of lights.

I already have this working.
I just put all my folliage with Light Map Resulotion = 4