08.10.11 16:10:29 sapien pc 01.00.00.0609 ----------------------------------------------
08.10.11 16:10:29 reference function: _write_to_error_file
08.10.11 16:10:29 reference address: 401b13
08.10.11 16:10:29 Couldn't read map file './sapienbeta.map'
08.10.11 16:10:30 CreateDevice succeeded with refresh rate = 0
08.10.11 16:10:30 EAX: 0x00000000
08.10.11 16:10:30 EBX: 0x80070057
08.10.11 16:10:30 ECX: 0x00000005
08.10.11 16:10:30 EDX: 0x00190008
08.10.11 16:10:30 EDI: 0x06E8E5A0
08.10.11 16:10:30 ESI: 0x00000011
08.10.11 16:10:30 EBP: 0x0018F2DC
08.10.11 16:10:30 ESP: 0x0018F1F8
08.10.11 16:10:30 EIP: 0x750B40CC, 21 06 E9 E0 ?????
08.10.11 16:10:30 005E80DE ?????
08.10.11 16:10:30 6AB5A0A2 ?????
08.10.11 16:10:30 6AB5A113 ?????
08.10.11 16:10:30 6AB17641 ?????
08.10.11 16:10:30 6AB17BED ?????
08.10.11 16:10:30 EXCEPTION_ACCESS_VIOLATION
how can i use this to stop Sapien from opening then closing suddenly when i try to open a scenario file

Wow i have never seen this issue before... Here are the things I do in case of dead sapien or you know...

1.- Open tool, and the run "build-cache-file"

tool build-cache-file levels\"yourmap"\"yourmap"

and then Im sure that tool will tell you about compiling problems and you will see the error, I think that you are missing some tags.

2.- The other way is opening the scenario in guerilla, scroll down and if you see while scrolling down guerilla closes, there is the problem.
Open the scenario in guerilla again, and find where is the problem... may be in scenery, sounds, AI, etc.
Then Run guerilla as administrator and open the scenario file, this time guerilla wil not close, once you find where is the problem you can modifiy or edit the scenario in guerilla by deleting some tags, etc.

SOrry about my english.

i had the same problem... here is how i fixed it:
http://www.youtube.com/watch?v=eof4mP1YV7c

thx for the help i will tell you if it worked