Radiosity exceptioning

I tried in both Sapien and tool and I get the same message after lightmaps finish

12.14.08 16:12:58 EAX: 0x07303000
12.14.08 16:12:58 EBX: 0xFFFFFF01
12.14.08 16:12:58 ECX: 0x0012F9D8
12.14.08 16:12:58 EDX: 0x00001000
12.14.08 16:12:58 EDI: 0x0012F9D8
12.14.08 16:12:58 ESI: 0x00000000
12.14.08 16:12:58 EBP: 0x0012F8B0
12.14.08 16:12:58 ESP: 0x0012F8A0
12.14.08 16:12:58 EIP: 0x7C90EB94, C3 8D A4 24 ?????
12.14.08 16:12:58 EXCEPTION halt in \halopc\haloce\source\structures\radiosity\interme diate_radiosity.c,#2479: new_surface_index>=0 && new_surface_index<structure->surfaces.count

did you skip fixing any warnings?
I'm guessing clipped surfaces, or portalling errors.
I think structure->surfaces is null, and doesn't have a count property, causing exception, so it's some kind of structure related problem