HaloMods "Classic" Read-only Archive

when i try the structure command in tool.exe it says


C:\Program Files\Microsoft Games\Halo Custom Edition>tool structure levels\splin
ter splinter
Couldn't read map file './toolbeta.map'
building intermediate geometry...
EAX: 0xFFFFFFFE
EBX: 0x001EED01
ECX: 0x0012F2D0
EDX: 0x000002CC
EDI: 0x0012F2D0
ESI: 0x00000000
EBP: 0x0012F1A8
ESP: 0x0012F198
EIP: 0x7C90EB94, C3 8D A4 24 ?????
EXCEPTION halt in .\intermediate_geometry.c,#444: triangle->material_index>=0 &&
triangle->material_index<old_material_count

C:\Program Files\Microsoft Games\Halo Custom Edition>

ive searched the forums for this but i cant find anything helpful