Thanks for answering me.
This is a new map, everything was created, nothing was copied from another map.
By the way this is the first time I see that message too and actually I don’t know what to do, I just don’t wanna lose it. ?
@EDIT I also tried to clean the lightmap and I get this error even with no lightmaps.
And also for any reason the weemapcache don’t accept the map.gat to include it in game.