Rolling Door Rock Thing Problem

[martynball]

ive made a door were a big rock moves out of the way wen u go up to it but when i try to do the tool collision-geometry machines\rolling_door
tool gives me this error:

C:\Program Files\Microsoft Games\Halo Custom Edition>tool collision-geometry mac
hines\rolling_door
Couldn't read map file './toolbeta.map'
### rolling_door_collision.jms
EAX: 0x001EF0C8
EBX: 0x00000101
ECX: 0x001EEFE8
EDX: 0x00230570
EDI: 0x0012CF60
ESI: 0x00000000
EBP: 0x0012CE38
ESP: 0x0012CE28
EIP: 0x7C90EB94, C3 8D A4 24 ?????
EXCEPTION halt in .\import_collision_bsp\build_collision_bsp.c,#387: global_plan
e_count<MAXIMUM_BSP3D_DEPTH

please can someone tell me why