I got this error when I tested a level (1.16 Beta 14) I had just added a trigger zone to spawn an entity, which was the only change.
After this no level/map would build and always got the exact same error. I then when through cleaning all bin/dbo etc as well as deleting all in the levelbank test game, lightmaps etc.
Still got the same error everytime I tried to test a level. So I backed up my files folder and removed every trace of FPSc. I then reinstalled v1.0 and updated to 1.15
My levels/maps loaded and tested fine, but could not go back the v1.15 laggy FPS so installed 1.16 beta 15 from here.
My levels load and test fine still and back to fluid FPS and movement thank god, BUT now I can no longer lightmap my levels.
No matter what I set it to in either/both prefs and build game, I get no shadows or any sort of mapping at all
p.s. Also all smoothing seems to have gone?? so you get horrid poly lines and such with everything seeming flat shaded.
I only use this for fun and have no interest in making commercial games ^_^